---
title: "CVE-2021-47271\n | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2021-47271?format=md
keywords: index, follow
---
# CVE-2021-47271
Publication date 21 May 2024
Last updated 4 July 2026
---
Ubuntu priority
**Medium**
[Why this priority?](https://ubuntu.com/security/cves/about#priority )
## Cvss 3 Severity Score
**5.5 · Medium**
[Score breakdown](https://ubuntu.com/security/CVE-2021-47271?format=md#impact-score)
Toggle side navigation
## Description
In the Linux kernel, the following vulnerability has been resolved:
usb: cdnsp: Fix deadlock issue in cdnsp\_thread\_irq\_handler
Patch fixes the following critical issue caused by deadlock which has been
detected during testing NCM class:
smp: csd: Detected non-responsive CSD lock (#1) on CPU#0
smp: csd: CSD lock (#1) unresponsive.
....
RIP: 0010:native\_queued\_spin\_lock\_slowpath+0x61/0x1d0
RSP: 0018:ffffbc494011cde0 EFLAGS: 00000002
RAX: 0000000000000101 RBX: ffff9ee8116b4a68 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff9ee8116b4658
RBP: ffffbc494011cde0 R08: 0000000000000001 R09: 0000000000000000
R10: ffff9ee8116b4670 R11: 0000000000000000 R12: ffff9ee8116b4658
R13: ffff9ee8116b4670 R14: 0000000000000246 R15: ffff9ee8116b4658
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7bcc41a830 CR3: 000000007a612003 CR4: 00000000001706e0
Call Trace:
do\_raw\_spin\_lock+0xc0/0xd0
\_raw\_spin\_lock\_irqsave+0x95/0xa0
cdnsp\_gadget\_ep\_queue.cold+0x88/0x107 [cdnsp\_udc\_pci]
usb\_ep\_queue+0x35/0x110
eth\_start\_xmit+0x220/0x3d0 [u\_ether]
ncm\_tx\_timeout+0x34/0x40 [usb\_f\_ncm]
? ncm\_free\_inst+0x50/0x50 [usb\_f\_ncm]
\_\_hrtimer\_run\_queues+0xac/0x440
hrtimer\_run\_softirq+0x8c/0xb0
\_\_do\_softirq+0xcf/0x428
asm\_call\_irq\_on\_stack+0x12/0x20
do\_softirq\_own\_stack+0x61/0x70
irq\_exit\_rcu+0xc1/0xd0
sysvec\_apic\_timer\_interrupt+0x52/0xb0
asm\_sysvec\_apic\_timer\_interrupt+0x12/0x20
RIP: 0010:do\_raw\_spin\_trylock+0x18/0x40
RSP: 0018:ffffbc494138bda8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff9ee8116b4658 RCX: 0000000000000000
RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff9ee8116b4658
RBP: ffffbc494138bda8 R08: 0000000000000001 R09: 0000000000000000
R10: ffff9ee8116b4670 R11: 0000000000000000 R12: ffff9ee8116b4658
R13: ffff9ee8116b4670 R14: ffff9ee7b5c73d80 R15: ffff9ee8116b4000
\_raw\_spin\_lock+0x3d/0x70
? cdnsp\_thread\_irq\_handler.cold+0x32/0x112c [cdnsp\_udc\_pci]
cdnsp\_thread\_irq\_handler.cold+0x32/0x112c [cdnsp\_udc\_pci]
? cdnsp\_remove\_request+0x1f0/0x1f0 [cdnsp\_udc\_pci]
? cdnsp\_thread\_irq\_handler+0x5/0xa0 [cdnsp\_udc\_pci]
? irq\_thread+0xa0/0x1c0
irq\_thread\_fn+0x28/0x60
irq\_thread+0x105/0x1c0
? \_\_kthread\_parkme+0x42/0x90
? irq\_forced\_thread\_fn+0x90/0x90
? wake\_threads\_waitq+0x30/0x30
? irq\_thread\_check\_affinity+0xe0/0xe0
kthread+0x12a/0x160
? kthread\_park+0x90/0x90
ret\_from\_fork+0x22/0x30
The root cause of issue is spin\_lock/spin\_unlock instruction instead
spin\_lock\_irqsave/spin\_lock\_irqrestore in cdnsp\_thread\_irq\_handler
function.
## Status
Show unmaintained releases
| Package | Ubuntu Release | Status |
| --- | --- | --- |
| linux | 24.04 LTS noble | Not affected |
| 23.10 mantic | Not affected |
| 22.04 LTS jammy | Not affected |
| 20.04 LTS focal | Not affected |
| 18.04 LTS bionic | Not affected |
| 16.04 LTS xenial | Not affected |
| 14.04 LTS trusty | Not affected |
| linux-allwinner-5.19 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Ignored end of kernel support |
| 20.04 LTS focal | Not in release |
| linux-aws | 24.04 LTS noble | Not affected |
| 23.10 mantic | Not affected |
| 22.04 LTS jammy | Not affected |
| 20.04 LTS focal | Not affected |
| 18.04 LTS bionic | Not affected |
| 16.04 LTS xenial | Not affected |
| 14.04 LTS trusty | Not affected |
| linux-aws-5.0 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Not in release |
| 18.04 LTS bionic | Ignored superseded by linux-aws-5.3 |
| linux-aws-5.11 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Ignored end of standard support, was ignored [superseded by linux-aws-5.13] |
| linux-aws-5.13 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Ignored end of standard support, was ignored [superseded by linux-aws-5.15] |
| linux-aws-5.15 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Not affected |
| linux-aws-5.19 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Ignored superseded by linux-aws-6.2 |
| 20.04 LTS focal | Not in release |
| linux-aws-5.3 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Not in release |
| 18.04 LTS bionic | Ignored superseded by linux-aws-5.4 |
| linux-aws-5.4 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Not in release |
| 18.04 LTS bionic | Not affected |
| linux-aws-5.8 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Ignored end of standard support, was ignored [superseded by linux-aws-5.11] |
| linux-aws-6.2 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Ignored superseded by linux-aws-6.5 |
| 20.04 LTS focal | Not in release |
| linux-aws-6.5 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not affected |
| 20.04 LTS focal | Not in release |
| linux-aws-fips | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal FIPS | Not affected |
| 18.04 LTS bionic FIPS | Not affected |
| linux-aws-hwe | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Not in release |
| 16.04 LTS xenial | Not affected |
| linux-azure | 24.04 LTS noble | Not affected |
| 23.10 mantic | Not affected |
| 22.04 LTS jammy | Not affected |
| 20.04 LTS focal | Not affected |
| 18.04 LTS bionic | Ignored superseded by linux-azure-5.3 |
| 16.04 LTS xenial | Not affected |
| 14.04 LTS trusty | Not affected |
| linux-azure-4.15 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Not in release |
| 18.04 LTS bionic | Not affected |
| linux-azure-5.11 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Ignored end of standard support, was ignored [superseded by linux-azure-5.13] |
| linux-azure-5.13 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Ignored end of standard support, was ignored [superseded by linux-azure-5.15] |
| linux-azure-5.15 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Not affected |
| linux-azure-5.19 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Ignored superseded by linux-azure-6.2 |
| 20.04 LTS focal | Not in release |
| linux-azure-5.3 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Not in release |
| 18.04 LTS bionic | Ignored superseded by linux-azure-5.4 |
| linux-azure-5.4 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Not in release |
| 18.04 LTS bionic | Not affected |
| linux-azure-5.8 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Ignored end of standard support, was ignored [superseded by linux-azure-5.11] |
| linux-azure-6.2 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Ignored superseded by linux-azure-6.5 |
| 20.04 LTS focal | Not in release |
| linux-azure-6.5 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not affected |
| 20.04 LTS focal | Not in release |
| linux-azure-edge | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Not in release |
| 18.04 LTS bionic | Ignored superseded by linux-azure-5.3 |
| linux-azure-fde | 24.04 LTS noble | Not affected |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not affected |
| 20.04 LTS focal | Ignored end of standard support, was ignored [superseded by linux-azure-fde-5.15] |
| linux-azure-fde-5.15 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Not affected |
| linux-azure-fde-5.19 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Ignored superseded by linux-azure-fde-6.2 |
| 20.04 LTS focal | Not in release |
| linux-azure-fde-6.2 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Ignored replaced by linux-azure-6.5 |
| 20.04 LTS focal | Not in release |
| linux-azure-fips | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal FIPS | Not affected |
| 18.04 LTS bionic FIPS | Not affected |
| linux-bluefield | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Not affected |
| linux-fips | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal FIPS | Not affected |
| 18.04 LTS bionic FIPS | Not affected |
| 16.04 LTS xenial FIPS | Not affected |
| linux-gcp | 24.04 LTS noble | Not affected |
| 23.10 mantic | Not affected |
| 22.04 LTS jammy | Not affected |
| 20.04 LTS focal | Not affected |
| 18.04 LTS bionic | Ignored superseded by linux-gcp-5.3 |
| 16.04 LTS xenial | Not affected |
| linux-gcp-4.15 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Not in release |
| 18.04 LTS bionic | Not affected |
| linux-gcp-5.11 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Ignored end of standard support, was ignored [superseded by linux-gcp-5.13] |
| linux-gcp-5.13 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Ignored end of standard support, was ignored [superseded by linux-gcp-5.15] |
| linux-gcp-5.15 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Not affected |
| linux-gcp-5.19 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Ignored superseded by linux-gcp-6.2 |
| 20.04 LTS focal | Not in release |
| linux-gcp-5.3 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Not in release |
| 18.04 LTS bionic | Ignored superseded by linux-gcp-5.4 |
| linux-gcp-5.4 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Not in release |
| 18.04 LTS bionic | Not affected |
| linux-gcp-5.8 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Ignored end of standard support, was ignored [superseded by linux-gcp-5.11] |
| linux-gcp-6.2 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Ignored superseded by linux-gcp-6.5 |
| 20.04 LTS focal | Not in release |
| linux-gcp-6.5 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not affected |
| 20.04 LTS focal | Not in release |
| linux-gcp-fips | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal FIPS | Not affected |
| 18.04 LTS bionic FIPS | Not affected |
| linux-gke | 24.04 LTS noble | Not affected |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not affected |
| 20.04 LTS focal | Ignored end of kernel support |
| linux-gke-4.15 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Not in release |
| 18.04 LTS bionic | Ignored superseded by linux-gke-5.0 |
| linux-gke-5.15 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Ignored end of kernel support |
| linux-gke-5.4 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Not in release |
| 18.04 LTS bionic | Ignored end of kernel support |
| linux-gkeop | 24.04 LTS noble | Not affected |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not affected |
| 20.04 LTS focal | Not affected |
| linux-gkeop-5.15 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Not affected |
| linux-gkeop-5.4 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Not in release |
| 18.04 LTS bionic | Ignored end of kernel support |
| linux-hwe | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Not in release |
| 18.04 LTS bionic | Ignored replaced by linux-hwe-5.4 |
| 16.04 LTS xenial | Not affected |
| linux-hwe-5.11 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Ignored end of standard support, was ignored [superseded by linux-hwe-5.13] |
| linux-hwe-5.13 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Ignored end of standard support, was ignored [superseded by linux-hwe-5.15] |
| linux-hwe-5.15 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Not affected |
| linux-hwe-5.19 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Ignored superseded by linux-hwe-6.2 |
| 20.04 LTS focal | Not in release |
| linux-hwe-5.4 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Not in release |
| 18.04 LTS bionic | Not affected |
| linux-hwe-5.8 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Ignored end of standard support, was ignored [superseded by linux-hwe-5.11] |
| linux-hwe-6.2 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Ignored superseded by linux-hwe-6.5 |
| 20.04 LTS focal | Not in release |
| linux-hwe-6.5 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not affected |
| 20.04 LTS focal | Not in release |
| linux-hwe-edge | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Not in release |
| 18.04 LTS bionic | Ignored superseded by linux-hwe-5.4 |
| 16.04 LTS xenial | Ignored end of ESM support, was ignored [superseded by linux-hwe] |
| linux-ibm | 24.04 LTS noble | Not affected |
| 23.10 mantic | Ignored end of kernel support |
| 22.04 LTS jammy | Not affected |
| 20.04 LTS focal | Not affected |
| linux-ibm-5.15 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Not affected |
| linux-ibm-5.4 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Not in release |
| 18.04 LTS bionic | Not affected |
| linux-intel | 24.04 LTS noble | Not affected |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Not in release |
| 18.04 LTS bionic | Not in release |
| 16.04 LTS xenial | Not in release |
| 14.04 LTS trusty | Not in release |
| linux-intel-5.13 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Ignored end of kernel support |
| linux-intel-iotg | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not affected |
| 20.04 LTS focal | Not in release |
| linux-intel-iotg-5.15 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Not affected |
| linux-iot | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Not affected |
| linux-kvm | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not affected |
| 20.04 LTS focal | Not affected |
| 18.04 LTS bionic | Not affected |
| 16.04 LTS xenial | Not affected |
| linux-laptop | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not affected |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Not in release |
| linux-lowlatency | 24.04 LTS noble | Not affected |
| 23.10 mantic | Not affected |
| 22.04 LTS jammy | Not affected |
| 20.04 LTS focal | Not in release |
| linux-lowlatency-hwe-5.15 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Not affected |
| linux-lowlatency-hwe-5.19 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Ignored superseded by linux-lowlatency-hwe-6.2 |
| 20.04 LTS focal | Not in release |
| linux-lowlatency-hwe-6.2 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Ignored superseded by linux-lowlatency-hwe-6.5 |
| 20.04 LTS focal | Not in release |
| linux-lowlatency-hwe-6.5 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not affected |
| 20.04 LTS focal | Not in release |
| linux-lts-xenial | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Not in release |
| 14.04 LTS trusty | Not affected |
| linux-nvidia | 24.04 LTS noble | Not affected |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not affected |
| 20.04 LTS focal | Not in release |
| linux-nvidia-6.2 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Ignored superseded by linux-nvidia-6.5 |
| 20.04 LTS focal | Not in release |
| linux-nvidia-6.5 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not affected |
| 20.04 LTS focal | Not in release |
| linux-nvidia-6.8 | 24.04 LTS noble | Not in release |
| 22.04 LTS jammy | Not affected |
| 20.04 LTS focal | Not in release |
| 18.04 LTS bionic | Not in release |
| 16.04 LTS xenial | Not in release |
| 14.04 LTS trusty | Not in release |
| linux-nvidia-lowlatency | 24.04 LTS noble | Not affected |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Not in release |
| 18.04 LTS bionic | Not in release |
| 16.04 LTS xenial | Not in release |
| 14.04 LTS trusty | Not in release |
| linux-oem | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Not in release |
| 18.04 LTS bionic | Ignored replaced by linux-hwe-5.4 |
| linux-oem-5.10 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Ignored end of standard support, was ignored [superseded by linux-oem-5.13] |
| linux-oem-5.13 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Ignored end of standard support, was ignored [superseded by linux-oem-5.14] |
| linux-oem-5.14 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Ignored end of standard support, was ignored [replaced by linux-hwe-5.15] |
| linux-oem-5.17 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Ignored superseded by linux-oem-6.1 |
| 20.04 LTS focal | Not in release |
| linux-oem-5.6 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Ignored end of standard support, was ignored [superseded by linux-oem-5.10] |
| linux-oem-6.0 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Ignored superseded by linux-oem-6.1 |
| 20.04 LTS focal | Not in release |
| linux-oem-6.1 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Ignored superseded by linux-oem-6.5 |
| 20.04 LTS focal | Not in release |
| linux-oem-6.5 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not affected |
| 20.04 LTS focal | Not in release |
| linux-oem-6.8 | 24.04 LTS noble | Not affected |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Not in release |
| 18.04 LTS bionic | Not in release |
| 16.04 LTS xenial | Not in release |
| 14.04 LTS trusty | Not in release |
| linux-oracle | 24.04 LTS noble | Not affected |
| 23.10 mantic | Not affected |
| 22.04 LTS jammy | Not affected |
| 20.04 LTS focal | Not affected |
| 18.04 LTS bionic | Not affected |
| 16.04 LTS xenial | Not affected |
| linux-oracle-5.0 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Not in release |
| 18.04 LTS bionic | Ignored superseded by linux-oracle-5.3 |
| linux-oracle-5.11 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Ignored end of standard support, was ignored [superseded by linux-oracle-5.13] |
| linux-oracle-5.13 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Ignored end of standard support, was ignored [superseded by linux-oracle-5.15] |
| linux-oracle-5.15 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Not affected |
| linux-oracle-5.3 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Not in release |
| 18.04 LTS bionic | Ignored superseded by linux-oracle-5.4 |
| linux-oracle-5.4 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Not in release |
| 18.04 LTS bionic | Not affected |
| linux-oracle-5.8 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Ignored end of standard support, was ignored [superseded by linux-oracle-5.11] |
| linux-oracle-6.5 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not affected |
| 20.04 LTS focal | Not in release |
| linux-raspi | 24.04 LTS noble | Not affected |
| 23.10 mantic | Not affected |
| 22.04 LTS jammy | Not affected |
| 20.04 LTS focal | Not affected |
| linux-raspi-5.4 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Not in release |
| 18.04 LTS bionic | Not affected |
| linux-raspi2 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Ignored end of standard support, was ignored [replaced by linux-raspi] |
| linux-riscv | 24.04 LTS noble | Not affected |
| 23.10 mantic | Not affected |
| 22.04 LTS jammy | Ignored end of kernel support |
| 20.04 LTS focal | Ignored end of standard support, was ignored [superseded by linux-riscv-5.8] |
| linux-riscv-5.11 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Ignored end of standard support, was ignored [superseded by linux-riscv-5.13] |
| linux-riscv-5.15 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Not affected |
| linux-riscv-5.19 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Ignored end of kernel support |
| 20.04 LTS focal | Not in release |
| linux-riscv-5.8 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Ignored end of standard support, was ignored [superseded by linux-riscv-5.11] |
| linux-riscv-6.5 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not affected |
| 20.04 LTS focal | Not in release |
| linux-starfive | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not affected |
| 22.04 LTS jammy | Not in release |
| 20.04 LTS focal | Not in release |
| linux-starfive-5.19 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Ignored end of kernel support |
| 20.04 LTS focal | Not in release |
| linux-starfive-6.2 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Ignored superseded by linux-starfive-6.5 |
| 20.04 LTS focal | Not in release |
| linux-starfive-6.5 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not affected |
| 20.04 LTS focal | Not in release |
| linux-xilinx-zynqmp | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not affected |
| 20.04 LTS focal | Not affected |
---
* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)
* [Patch details](https://ubuntu.com/security/CVE-2021-47271?format=md#patch-details)
### Patch details
For informational purposes only. We recommend not to cherry-pick updates. [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
| Package | Patch details |
| --- | --- |
| linux | * Introduced by [3d82904](https://git.kernel.org/linus/3d82904559f4f5a2622db1b21de3edf2eded7664), fixed by [a9aecef](https://git.kernel.org/linus/a9aecef198faae3240921b707bc09b602e966fce) |
## Severity score breakdown
CVSS version:
CVSS v3.0
**Base score**
5.5 · Medium
* Base metrics
| Parameter | Value |
| --- | --- |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality impact | None |
| Integrity impact | None |
| Availability impact | High |
* Scores
| Parameter | Value |
| --- | --- |
| Base score | 5.5 · Medium |
| Exploitability score | - |
| Impact score | - |
**Vector:** CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
## References
* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-47271)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2021-47271)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2021-47271)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2021-47271)
### Other references
*
*
*
*