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CVE-2020-29372

Published: 28 November 2020

An issue was discovered in do_madvise in mm/madvise.c in the Linux kernel before 5.6.8. There is a race condition between coredump operations and the IORING_OP_MADVISE implementation, aka CID-bc0c4d1e176e.

From the Ubuntu security team

Jann Horn discovered that a race condition existed in the madvise implementation in the Linux kernel, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash).

Priority

Medium

CVSS 3 base score: 4.7

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.13.0-16.19)
focal Not vulnerable
(5.4.0-9.12)
groovy Not vulnerable
(5.4.0-26.30)
precise Ignored
(was needs-triage ESM criteria)
trusty Ignored
(was needs-triage ESM criteria)
upstream
Released (5.7~rc3)
xenial Not vulnerable
(4.2.0-16.19)
Patches:
Introduced by

c1ca757bd6f4632c510714631ddcc2d13030fe1e

Fixed by bc0c4d1e176eeb614dc8734fc3ace34292771f11
linux-aws
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.15.0-1001.1)
focal Not vulnerable
(5.4.0-1005.5)
groovy Not vulnerable
(5.4.0-1009.9)
precise Does not exist

trusty Ignored
(was needs-triage ESM criteria)
upstream
Released (5.7~rc3)
xenial Not vulnerable
(4.4.0-1001.10)
linux-aws-5.0
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-aws-5.3)
focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

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(superseded by linux-aws-5.4)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

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

linux-aws-5.4
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.4.0-1018.18~18.04.1)
focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

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

focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Not vulnerable
(4.15.0-1030.31~16.04.1)
linux-azure
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-azure-5.3)
focal Not vulnerable
(5.4.0-1006.6)
groovy Not vulnerable
(5.4.0-1010.10)
precise Does not exist

trusty Ignored
(was needs-triage ESM criteria)
upstream
Released (5.7~rc3)
xenial Not vulnerable
(4.11.0-1009.9)
linux-azure-4.15
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.15.0-1082.92)
focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

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

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

linux-azure-5.4
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.4.0-1020.20~18.04.1)
focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

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

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

linux-dell300x
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.15.0-1005.8)
focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

linux-gcp
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-gcp-5.3)
focal Not vulnerable
(5.4.0-1005.5)
groovy Not vulnerable
(5.4.0-1009.9)
precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Not vulnerable
(4.10.0-1004.4)
linux-gcp-4.15
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.15.0-1071.81)
focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

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

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

linux-gcp-5.4
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.4.0-1019.19~18.04.2)
focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

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

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

linux-gke-4.15
Launchpad, Ubuntu, Debian
bionic Ignored
(was pending [4.15.0-1079.84] now end-of-life)
focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

linux-gke-5.0
Launchpad, Ubuntu, Debian
bionic Ignored
(was needed now end-of-life)
focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

linux-gke-5.3
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.3.0-1011.12~18.04.1)
focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

linux-gke-5.4
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.4.0-1025.25~18.04.1)
focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

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

focal Not vulnerable
(5.4.0-1008.9)
groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

linux-gkeop-5.4
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.4.0-1001.1)
focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

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

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Not vulnerable
(4.8.0-36.36~16.04.1)
linux-hwe-5.4
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.4.0-37.41~18.04.1)
focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

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

focal Not vulnerable
(5.8.0-23.24~20.04.1)
groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

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

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Ignored
(superseded by linux-hwe)
linux-kvm
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.15.0-1002.2)
focal Not vulnerable
(5.4.0-1004.4)
groovy Not vulnerable
(5.4.0-1009.9)
precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Not vulnerable
(4.4.0-1004.9)
linux-lts-trusty
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Does not exist

groovy Does not exist

precise Ignored
(was needs-triage ESM criteria)
trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

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

focal Does not exist

groovy Does not exist

precise Does not exist

trusty Ignored
(was needs-triage ESM criteria)
upstream
Released (5.7~rc3)
xenial Does not exist

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

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Ignored
(superseded by linux-hwe)
linux-oem-5.10
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Not vulnerable
(5.10.0-1008.9)
groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

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

focal
Released (5.6.0-1010.10)
groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

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

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

linux-oracle
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.15.0-1007.9)
focal Not vulnerable
(5.4.0-1005.5)
groovy Not vulnerable
(5.4.0-1009.9)
precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Not vulnerable
(4.15.0-1007.9~16.04.1)
linux-oracle-5.0
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-oracle-5.3)
focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

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

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

linux-oracle-5.4
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.4.0-1019.19~18.04.1)
focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

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

focal Not vulnerable
(5.4.0-1007.7)
groovy Not vulnerable
(5.4.0-1008.8)
precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

linux-raspi-5.4
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.4.0-1013.13~18.04.1)
focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

linux-raspi2
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.13.0-1005.5)
focal Ignored
(replaced by linux-raspi)
groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Not vulnerable
(4.2.0-1013.19)
linux-raspi2-5.3
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.3.0-1017.19~18.04.1)
focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

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

focal Ignored
(was needed now end-of-life)
groovy Not vulnerable
(5.4.0-24.28)
precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Does not exist

linux-snapdragon
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.4.0-1077.82)
focal Does not exist

groovy Does not exist

precise Does not exist

trusty Does not exist

upstream
Released (5.7~rc3)
xenial Not vulnerable
(4.4.0-1013.15)