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CVE-2022-43945

Published: 4 November 2022

The Linux kernel NFSD implementation prior to versions 5.19.17 and 6.0.2 are vulnerable to buffer overflow. NFSD tracks the number of pages held by each NFSD thread by combining the receive and send buffers of a remote procedure call (RPC) into a single array of pages. A client can force the send buffer to shrink by sending an RPC message over TCP with garbage data added at the end of the message. The RPC message with garbage data is still correctly formed according to the specification and is passed forward to handlers. Vulnerable code in NFSD is not expecting the oversized request and writes beyond the allocated buffer space. CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

From the Ubuntu Security Team

It was discovered that the NFSD implementation in the Linux kernel did not properly handle some RPC messages, leading to a buffer overflow. A remote attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.

Priority

High

CVSS 3 base score: 7.5

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-202.213)
focal
Released (5.4.0-137.154)
jammy
Released (5.15.0-56.62)
kinetic
Released (5.19.0-26.27)
trusty Needed

upstream
Released (6.1~rc1)
xenial
Released (4.4.0-236.270)
Patches:
Introduced by

5191955d6fc65e6d4efe8f4f10a6028298f57281

Fixed by 90bfc37b5ab91c1a6165e3e5cfc49bf04571b762
Introduced by

bddfdbcddbe267519cd36aeb115fdf8620980111

Fixed by 1242a87da0d8cd2a428e96ca68e7ea899b0f4624
Introduced by

53b1119a6e5028b125f431a0116ba73510d82a72

Fixed by 00b4492686e0497fdb924a9d4c8f6f99377e176c
Introduced by

5650682e16f41722f735b7beeb2dbc3411dfbeb6

Fixed by 640f87c190e0d1b2a0fcb2ecf6d2cd53b1c41991
Introduced by

5650682e16f41722f735b7beeb2dbc3411dfbeb6

Fixed by 401bc1f90874280a80b93f23be33a0e7e2d1f912
Introduced by

5650682e16f41722f735b7beeb2dbc3411dfbeb6

Fixed by fa6be9cc6e80ec79892ddf08a8c10cabab9baf38
Introduced by

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2

Fixed by 76ce4dcec0dc08a032db916841ddc4e3998be317
linux-aws
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1148.160)
focal
Released (5.4.0-1094.102)
jammy
Released (5.15.0-1026.30)
kinetic
Released (5.19.0-1014.15)
trusty
Released (4.4.0-1115.121)
upstream
Released (6.1~rc1)
xenial
Released (4.4.0-1153.168)
linux-aws-5.0
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-aws-5.3)
focal Does not exist

jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream
Released (6.1~rc1)
xenial Does not exist

linux-aws-5.11
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Ignored
(superseded by linux-aws-5.13)
jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream Ignored
(superseded by linux-aws-5.13)
xenial Does not exist

linux-aws-5.13
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Ignored
(superseded by linux-aws-5.15)
jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream Ignored
(superseded by linux-aws-5.15)
xenial Does not exist

linux-aws-5.15
Launchpad, Ubuntu, Debian
bionic Does not exist

focal
Released (5.15.0-1026.30~20.04.2)
jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream
Released (6.1~rc1)
xenial Does not exist

linux-aws-5.3
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-aws-5.4)
focal Does not exist

jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream Ignored
(superseded by linux-aws-5.4)
xenial Does not exist

linux-aws-5.4
Launchpad, Ubuntu, Debian
bionic
Released (5.4.0-1094.102~18.04.1)
focal Does not exist

jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream
Released (6.1~rc1)
xenial Does not exist

linux-aws-5.8
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Ignored
(superseded by linux-aws-5.11)
jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream Ignored
(superseded by linux-aws-5.11)
xenial Does not exist

linux-aws-hwe
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Does not exist

jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream
Released (6.1~rc1)
xenial Pending
(4.15.0-1148.160~16.04.1)
linux-azure
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-azure-5.3)
focal
Released (5.4.0-1101.107)
jammy
Released (5.15.0-1029.36)
kinetic
Released (5.19.0-1013.14)
trusty Pending
(4.15.0-1159.174~14.04.1)
upstream
Released (6.1~rc1)
xenial Pending
(4.15.0-1160.175~16.04.1)
linux-azure-4.15
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1159.174)
focal Does not exist

jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream
Released (6.1~rc1)
xenial Does not exist

linux-azure-5.11
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Ignored
(superseded by linux-azure-5.13)
jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream Ignored
(superseded by linux-azure-5.13)
xenial Does not exist

linux-azure-5.13
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Ignored
(superseded by linux-azure-5.15)
jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream Ignored
(superseded by linux-azure-5.15)
xenial Does not exist

linux-azure-5.15
Launchpad, Ubuntu, Debian
bionic Does not exist

focal
Released (5.15.0-1029.36~20.04.1)
jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream
Released (6.1~rc1)
xenial Does not exist

linux-azure-5.3
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-azure-5.4)
focal Does not exist

jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream Ignored
(superseded by linux-azure-5.4)
xenial Does not exist

linux-azure-5.4
Launchpad, Ubuntu, Debian
bionic
Released (5.4.0-1101.107~18.04.1)
focal Does not exist

jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream
Released (6.1~rc1)
xenial Does not exist

linux-azure-5.8
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Ignored
(superseded by linux-azure-5.11)
jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream Ignored
(superseded by linux-azure-5.11)
xenial Does not exist

linux-azure-edge
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-azure-5.3)
focal Does not exist

jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream
Released (6.1~rc1)
xenial Does not exist

linux-azure-fde
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Needs triage

jammy
Released (5.15.0-1029.36)
kinetic Does not exist

trusty Does not exist

upstream
Released (6.1~rc1)
xenial Does not exist

linux-bluefield
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Needed

jammy Not vulnerable
(5.15.0-1011.13)
kinetic Does not exist

trusty Does not exist

upstream
Released (6.1~rc1)
xenial Does not exist

linux-dell300x
Launchpad, Ubuntu, Debian
bionic Needed

focal Does not exist

jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream
Released (6.1~rc1)
xenial Does not exist

linux-fips
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Does not exist

jammy Does not exist

kinetic Does not exist

trusty Ignored
(out of standard support)
upstream
Released (6.1~rc1)
xenial Ignored
(out of standard support)
linux-gcp
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-gcp-5.3)
focal
Released (5.4.0-1098.107)
jammy
Released (5.15.0-1025.32)
kinetic
Released (5.19.0-1013.14)
trusty Does not exist

upstream
Released (6.1~rc1)
xenial Pending
(4.15.0-1143.159~16.04.1)
linux-gcp-4.15
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1143.159)
focal Does not exist

jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream
Released (6.1~rc1)
xenial Does not exist

linux-gcp-5.11
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Ignored
(superseded by linux-gcp-5.13)
jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream Ignored
(superseded by linux-gcp-5.13)
xenial Does not exist

linux-gcp-5.13
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Ignored
(superseded by linux-gcp-5.15)
jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream Ignored
(superseded by linux-gcp-5.15)
xenial Does not exist

linux-gcp-5.15
Launchpad, Ubuntu, Debian
bionic Does not exist

focal
Released (5.15.0-1025.32~20.04.2)
jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream
Released (6.1~rc1)
xenial Does not exist

linux-gcp-5.3
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-gcp-5.4)
focal Does not exist

jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream Ignored
(superseded by linux-gcp-5.4)
xenial Does not exist

linux-gcp-5.4
Launchpad, Ubuntu, Debian
bionic
Released (5.4.0-1098.107~18.04.1)
focal Does not exist

jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream
Released (6.1~rc1)
xenial Does not exist

linux-gcp-5.8
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Ignored
(superseded by linux-gcp-5.11)
jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream Ignored
(superseded by linux-gcp-5.11)
xenial Does not exist

linux-gke
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Pending
(5.4.0-1093.100)
jammy
Released (5.15.0-1023.28)
kinetic Does not exist

trusty Does not exist

upstream
Released (6.1~rc1)
xenial Needs triage

linux-gke-4.15
Launchpad, Ubuntu, Debian
bionic Ignored
(was needs-triage now end-of-life)
focal Does not exist

jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream
Released (6.1~rc1)
xenial Does not exist

linux-gke-5.0
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-gke-5.3)
focal Does not exist

jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream
Released (6.1~rc1)
xenial Does not exist

linux-gke-5.15
Launchpad, Ubuntu, Debian
bionic Does not exist

focal
Released (5.15.0-1023.28~20.04.2)
jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream
Released (6.1~rc1)
xenial Does not exist

linux-gke-5.3
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-gke-5.4)
focal Does not exist

jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream Ignored
(superseded by linux-gke-5.4)
xenial Does not exist

linux-gke-5.4
Launchpad, Ubuntu, Debian
bionic Ignored
(was needs-triage now end-of-life)
focal Does not exist

jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream
Released (6.1~rc1)
xenial Does not exist

linux-gkeop
Launchpad, Ubuntu, Debian
bionic Does not exist

focal
Released (5.4.0-1062.66)
jammy
Released (5.15.0-1011.15)
kinetic Does not exist

trusty Does not exist

upstream
Released (6.1~rc1)
xenial Does not exist

linux-gkeop-5.4
Launchpad, Ubuntu, Debian
bionic Ignored
(was needs-triage now end-of-life)
focal Does not exist

jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream
Released (6.1~rc1)
xenial Does not exist

linux-hwe
Launchpad, Ubuntu, Debian
bionic Ignored
(replaced by linux-hwe-5.4)
focal Does not exist

jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream
Released (6.1~rc1)
xenial Pending
(4.15.0-202.213~16.04.1)
linux-hwe-5.11
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Ignored
(superseded by linux-hwe-5.13)
jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream Ignored
(superseded by linux-hwe-5.13)
xenial Does not exist

linux-hwe-5.13
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Ignored
(superseded by linux-hwe-5.15)
jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream Ignored
(superseded by linux-hwe-5.15)
xenial Does not exist

linux-hwe-5.15
Launchpad, Ubuntu, Debian
bionic Does not exist

focal
Released (5.15.0-56.62~20.04.1)
jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream
Released (6.1~rc1)
xenial Does not exist

linux-hwe-5.4
Launchpad, Ubuntu, Debian
bionic
Released (5.4.0-137.154~18.04.1)
focal Does not exist

jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream
Released (6.1~rc1)
xenial Does not exist

linux-hwe-5.8
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Ignored
(superseded by linux-hwe-5.11)
jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream Ignored
(superseded by linux-hwe-5.11)
xenial Does not exist

linux-hwe-edge
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-hwe-5.4)
focal Does not exist

jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream
Released (6.1~rc1)
xenial Ignored
(superseded by linux-hwe)
linux-ibm
Launchpad, Ubuntu, Debian
bionic Does not exist

focal
Released (5.4.0-1042.47)
jammy
Released (5.15.0-1021.24)
kinetic
Released (5.19.0-1013.14)
trusty Does not exist

upstream
Released (6.1~rc1)
xenial Does not exist

linux-ibm-5.4
Launchpad, Ubuntu, Debian
bionic
Released (5.4.0-1042.47~18.04.1)
focal Does not exist

jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream
Released (6.1~rc1)
xenial Does not exist

linux-intel-5.13
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Ignored
(was needs-triage now end-of-life)
jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream
Released (6.1~rc1)
xenial Does not exist

linux-intel-iotg
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Does not exist

jammy
Released (5.15.0-1021.26)
kinetic Does not exist

trusty Does not exist

upstream
Released (6.1~rc1)
xenial Does not exist

linux-intel-iotg-5.15
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Pending
(5.15.0-1021.26~20.04.1)
jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream
Released (6.1~rc1)
xenial Does not exist

linux-kvm
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1134.139)
focal
Released (5.4.0-1084.90)
jammy
Released (5.15.0-1024.29)
kinetic
Released (5.19.0-1013.14)
trusty Does not exist

upstream
Released (6.1~rc1)
xenial
Released (4.4.0-1116.126)
linux-lowlatency
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Does not exist

jammy
Released (5.15.0-56.62)
kinetic
Released (5.19.0-1012.13)
trusty Does not exist

upstream
Released (6.1~rc1)
xenial Does not exist

linux-lowlatency-hwe-5.15
Launchpad, Ubuntu, Debian
bionic Does not exist

focal
Released (5.15.0-56.62~20.04.1)
jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream
Released (6.1~rc1)
xenial Does not exist

linux-lts-xenial
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Does not exist

jammy Does not exist

kinetic Does not exist

trusty
Released (4.4.0-236.270~14.04.1)
upstream
Released (6.1~rc1)
xenial Does not exist

linux-oem
Launchpad, Ubuntu, Debian
bionic Ignored
(was needs-triage now end-of-life)
focal Does not exist

jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream
Released (6.1~rc1)
xenial Needs triage

linux-oem-5.10
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Ignored
(was needs-triage now end-of-life)
jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream
Released (6.1~rc1)
xenial Does not exist

linux-oem-5.13
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Ignored
(superseded by linux-oem-5.14)
jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream Ignored
(superseded by linux-oem-5.14)
xenial Does not exist

linux-oem-5.14
Launchpad, Ubuntu, Debian
bionic Does not exist

focal
Released (5.14.0-1055.62)
jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream
Released (6.1~rc1)
xenial Does not exist

linux-oem-5.17
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Does not exist

jammy
Released (5.17.0-1024.25)
kinetic Needs triage

trusty Does not exist

upstream
Released (6.1~rc1)
xenial Does not exist

linux-oem-5.6
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Ignored
(was needs-triage now end-of-life)
jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream
Released (6.1~rc1)
xenial Does not exist

linux-oem-6.0
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Does not exist

jammy Needed

kinetic Does not exist

trusty Does not exist

upstream
Released (6.1~rc1)
xenial Does not exist

linux-oem-osp1
Launchpad, Ubuntu, Debian
bionic Ignored
(was needs-triage now end-of-life)
focal Does not exist

jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream
Released (6.1~rc1)
xenial Does not exist

linux-oracle
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1113.124)
focal
Released (5.4.0-1092.101)
jammy
Released (5.15.0-1025.31)
kinetic
Released (5.19.0-1013.14)
trusty Does not exist

upstream
Released (6.1~rc1)
xenial
Released (4.15.0-1113.124~16.04.1)
linux-oracle-5.0
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-oracle-5.3)
focal Does not exist

jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream
Released (6.1~rc1)
xenial Does not exist

linux-oracle-5.11
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Ignored
(superseded by linux-oracle-5.13)
jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream Ignored
(superseded by linux-oracle-5.13)
xenial Does not exist

linux-oracle-5.13
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Ignored
(was needs-triage now end-of-life)
jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream
Released (6.1~rc1)
xenial Does not exist

linux-oracle-5.15
Launchpad, Ubuntu, Debian
bionic Does not exist

focal
Released (5.15.0-1025.31~20.04.2)
jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream
Released (6.1~rc1)
xenial Does not exist

linux-oracle-5.3
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-oracle-5.4)
focal Does not exist

jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream Ignored
(superseded by linux-oracle-5.4)
xenial Does not exist

linux-oracle-5.4
Launchpad, Ubuntu, Debian
bionic
Released (5.4.0-1092.101~18.04.1)
focal Does not exist

jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream
Released (6.1~rc1)
xenial Does not exist

linux-oracle-5.8
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Ignored
(superseded by linux-oracle-5.11)
jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream Ignored
(superseded by linux-oracle-5.11)
xenial Does not exist

linux-raspi
Launchpad, Ubuntu, Debian
bionic Does not exist

focal
Released (5.4.0-1079.90)
jammy
Released (5.15.0-1021.23)
kinetic
Released (5.19.0-1009.16)
trusty Does not exist

upstream
Released (6.1~rc1)
xenial Does not exist

linux-raspi-5.4
Launchpad, Ubuntu, Debian
bionic Needed

focal Does not exist

jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream
Released (6.1~rc1)
xenial Does not exist

linux-raspi2
Launchpad, Ubuntu, Debian
bionic Needed

focal Ignored
(replaced by linux-raspi)
jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream
Released (6.1~rc1)
xenial Needs triage

linux-raspi2-5.3
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-raspi-5.4)
focal Does not exist

jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream Ignored
(superseded by linux-raspi2-5.4)
xenial Does not exist

linux-riscv
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Ignored
(superseded by linux-riscv-5.8)
jammy Ignored
(was pending [5.15.0-1026.30] now end-of-life)
kinetic Pending
(5.19.0-1009.10)
trusty Does not exist

upstream
Released (6.1~rc1)
xenial Does not exist

linux-riscv-5.11
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Ignored
(superseded by linux-riscv-5.13)
jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream Ignored
(superseded by linux-riscv-5.13)
xenial Does not exist

linux-riscv-5.8
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Ignored
(superseded by linux-riscv-5.11)
jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream Ignored
(superseded by linux-riscv-5.11)
xenial Does not exist

linux-snapdragon
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1144.154)
focal Does not exist

jammy Does not exist

kinetic Does not exist

trusty Does not exist

upstream
Released (6.1~rc1)
xenial Needs triage