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CVE-2021-47214

Publication date 10 April 2024

Last updated 5 August 2024

Ubuntu priority

Medium

Why this priority?

In the Linux kernel, the following vulnerability has been resolved: hugetlb, userfaultfd: fix reservation restore on userfaultfd error Currently in the is_continue case in hugetlb_mcopy_atomic_pte(), if we bail out using "goto out_release_unlock;" in the cases where idx >= size, or !huge_pte_none(), the code will detect that new_pagecache_page == false, and so call restore_reserve_on_error(). In this case I see restore_reserve_on_error() delete the reservation, and the following call to remove_inode_hugepages() will increment h->resv_hugepages causing a 100% reproducible leak. We should treat the is_continue case similar to adding a page into the pagecache and set new_pagecache_page to true, to indicate that there is no reservation to restore on the error path, and we need not call restore_reserve_on_error(). Rename new_pagecache_page to page_in_pagecache to make that clear.

Status

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18.04 LTS bionic Ignored superseded by linux-aws-5.3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20.04 LTS focal Ignored superseded by linux-aws-5.13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20.04 LTS focal Ignored superseded by linux-aws-5.15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22.04 LTS jammy Ignored superseded by linux-aws-6.2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 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 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-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 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 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 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 in release
23.10 mantic Not in release
22.04 LTS jammy
Not affected
20.04 LTS focal 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 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-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 Not in release
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 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 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 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 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-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
Needs evaluation
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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
linux