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CVE-2021-43057

Published: 28 October 2021

An issue was discovered in the Linux kernel before 5.14.8. A use-after-free in selinux_ptrace_traceme (aka the SELinux handler for PTRACE_TRACEME) could be used by local attackers to cause memory corruption and escalate privileges, aka CID-a3727a8bac0a. This occurs because of an attempt to access the subjective credentials of another task.

From the Ubuntu security team

Jann Horn discovered that the SELinux subsystem in the Linux kernel did not properly handle subjective credentials for tasks in some situations. On systems where SELinux has been enabled, a local attacker could possibly use this to cause a denial of service (system crash) or execute arbitrary code.

Priority

Low

CVSS 3 base score: 7.8

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.13.0-16.19)
focal Not vulnerable
(5.4.0-9.12)
hirsute Not vulnerable
(5.8.0-36.40+21.04.1)
impish
Released (5.13.0-22.22)
upstream
Released (5.15~rc3)
trusty Not vulnerable
(3.11.0-12.19)
xenial Not vulnerable
(4.4.0-2.16)
jammy Not vulnerable
(5.15.0-17.17)
linux-hwe
Launchpad, Ubuntu, Debian
trusty Does not exist

bionic Ignored
(replaced by linux-hwe-5.4)
focal Does not exist

hirsute Does not exist

impish Does not exist

upstream
Released (5.15~rc3)
xenial Not vulnerable
(4.8.0-39.42~16.04.1)
jammy Does not exist

linux-hwe-5.4
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

focal Does not exist

hirsute Does not exist

impish Does not exist

bionic Not vulnerable
(5.4.0-37.41~18.04.1)
upstream
Released (5.15~rc3)
jammy Does not exist

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

xenial Does not exist

bionic Does not exist

hirsute Does not exist

impish Does not exist

focal Not vulnerable
(5.8.0-23.24~20.04.1)
upstream
Released (5.15~rc3)
jammy Does not exist

linux-hwe-5.11
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

hirsute Does not exist

impish Does not exist

focal Not vulnerable
(5.11.0-22.23~20.04.1)
upstream
Released (5.15~rc3)
jammy Does not exist

linux-hwe-edge
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Ignored
(superseded by linux-hwe)
bionic Ignored
(superseded by linux-hwe-5.4)
focal Does not exist

hirsute Does not exist

impish Does not exist

upstream
Released (5.15~rc3)
jammy Does not exist

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

bionic Does not exist

focal Does not exist

hirsute Does not exist

impish Does not exist

trusty Not vulnerable
(4.4.0-13.29~14.04.1)
upstream
Released (5.15~rc3)
jammy Does not exist

linux-kvm
Launchpad, Ubuntu, Debian
trusty Does not exist

bionic Not vulnerable
(4.15.0-1002.2)
focal Not vulnerable
(5.4.0-1004.4)
hirsute Not vulnerable
(5.8.0-1010.11+21.04.1)
impish
Released (5.13.0-1006.6)
upstream
Released (5.15~rc3)
xenial Not vulnerable
(4.4.0-1004.9)
jammy Not vulnerable
(5.13.0-1006.6+22.04.1)
linux-aws
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(4.15.0-1001.1)
focal Not vulnerable
(5.4.0-1005.5)
hirsute Not vulnerable
(5.8.0-1018.20+21.04.1)
impish
Released (5.13.0-1007.8)
upstream
Released (5.15~rc3)
trusty Not vulnerable
(4.4.0-1002.2)
xenial Not vulnerable
(4.4.0-1001.10)
jammy Not vulnerable
(5.15.0-1002.4)
linux-aws-5.0
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Ignored
(superseded by linux-aws-5.3)
focal Does not exist

hirsute Does not exist

impish Does not exist

upstream
Released (5.15~rc3)
jammy Does not exist

linux-aws-5.3
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Ignored
(superseded by linux-aws-5.4)
focal Does not exist

hirsute Does not exist

impish Does not exist

upstream
Released (5.15~rc3)
jammy Does not exist

linux-aws-5.4
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

focal Does not exist

hirsute Does not exist

impish Does not exist

bionic Not vulnerable
(5.4.0-1018.18~18.04.1)
upstream
Released (5.15~rc3)
jammy Does not exist

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

xenial Does not exist

bionic Does not exist

hirsute Does not exist

impish Does not exist

focal Ignored
(was needs-triage now end-of-life)
upstream
Released (5.15~rc3)
jammy Does not exist

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

xenial Does not exist

bionic Does not exist

hirsute Does not exist

impish Does not exist

focal Not vulnerable
(5.11.0-1009.9~20.04.2)
upstream
Released (5.15~rc3)
jammy Does not exist

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

bionic Does not exist

focal Does not exist

hirsute Does not exist

impish Does not exist

upstream
Released (5.15~rc3)
xenial Not vulnerable
(4.15.0-1030.31~16.04.1)
jammy Does not exist

linux-azure
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-azure-5.3)
focal Not vulnerable
(5.4.0-1006.6)
hirsute Not vulnerable
(5.8.0-1016.17+21.04.1)
impish
Released (5.13.0-1008.9)
trusty Not vulnerable
(4.15.0-1023.24~14.04.1)
upstream
Released (5.15~rc3)
xenial Not vulnerable
(4.11.0-1009.9)
jammy Not vulnerable
(5.15.0-1001.2)
linux-azure-4.15
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

focal Does not exist

hirsute Does not exist

impish Does not exist

bionic Not vulnerable
(4.15.0-1082.92)
upstream
Released (5.15~rc3)
jammy Does not exist

linux-azure-5.3
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Ignored
(superseded by linux-azure-5.4)
focal Does not exist

hirsute Does not exist

impish Does not exist

upstream
Released (5.15~rc3)
jammy Does not exist

linux-azure-5.4
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

focal Does not exist

hirsute Does not exist

impish Does not exist

bionic Not vulnerable
(5.4.0-1020.20~18.04.1)
upstream
Released (5.15~rc3)
jammy Does not exist

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

xenial Does not exist

bionic Does not exist

hirsute Does not exist

impish Does not exist

focal Ignored
(was needs-triage now end-of-life)
upstream
Released (5.15~rc3)
jammy Does not exist

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

xenial Does not exist

bionic Does not exist

hirsute Does not exist

impish Does not exist

focal Not vulnerable
(5.11.0-1007.7~20.04.2)
upstream
Released (5.15~rc3)
jammy Does not exist

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

xenial Does not exist

bionic Does not exist

hirsute Does not exist

impish Does not exist

focal Not vulnerable
(5.4.0-1007.10)
upstream
Released (5.15~rc3)
jammy Does not exist

linux-dell300x
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

focal Does not exist

hirsute Does not exist

impish Does not exist

bionic Not vulnerable
(4.15.0-1005.8)
upstream
Released (5.15~rc3)
jammy Does not exist

linux-azure-edge
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Ignored
(superseded by linux-azure-5.3)
focal Does not exist

hirsute Does not exist

impish Does not exist

upstream
Released (5.15~rc3)
jammy Does not exist

linux-gcp
Launchpad, Ubuntu, Debian
trusty Does not exist

bionic Ignored
(superseded by linux-gcp-5.3)
focal Not vulnerable
(5.4.0-1005.5)
hirsute Not vulnerable
(5.8.0-1015.15+21.04.1)
impish
Released (5.13.0-1007.8)
upstream
Released (5.15~rc3)
xenial Not vulnerable
(4.10.0-1004.4)
jammy Not vulnerable
(5.15.0-1001.3)
linux-gcp-4.15
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

focal Does not exist

hirsute Does not exist

impish Does not exist

upstream
Released (5.15~rc3)
bionic Not vulnerable
(4.15.0-1071.81)
jammy Does not exist

linux-gcp-5.3
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Ignored
(superseded by linux-gcp-5.4)
focal Does not exist

hirsute Does not exist

impish Does not exist

upstream
Released (5.15~rc3)
jammy Does not exist

linux-gcp-5.4
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

focal Does not exist

hirsute Does not exist

impish Does not exist

upstream
Released (5.15~rc3)
bionic Not vulnerable
(5.4.0-1019.19~18.04.2)
jammy Does not exist

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

xenial Does not exist

bionic Does not exist

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

impish Does not exist

upstream
Released (5.15~rc3)
jammy Does not exist

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

xenial Does not exist

bionic Does not exist

focal Not vulnerable
(5.11.0-1009.10~20.04.1)
hirsute Does not exist

impish Does not exist

upstream
Released (5.15~rc3)
jammy Does not exist

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

xenial Ignored
(reached end of standard support)
bionic Does not exist

hirsute Does not exist

impish Does not exist

focal Not vulnerable
(5.4.0-1033.35)
upstream
Released (5.15~rc3)
jammy Not vulnerable
(5.15.0-1002.2)
linux-gke-4.15
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

focal Does not exist

hirsute Does not exist

impish Does not exist

bionic Ignored
(was needs-triage now end-of-life)
upstream
Released (5.15~rc3)
jammy Does not exist

linux-gke-5.0
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

focal Does not exist

hirsute Does not exist

impish Does not exist

bionic Ignored
(was needs-triage now end-of-life)
upstream
Released (5.15~rc3)
jammy Does not exist

linux-gke-5.3
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

focal Does not exist

hirsute Does not exist

impish Does not exist

bionic Ignored
(was needs-triage now end-of-life)
upstream
Released (5.15~rc3)
jammy Does not exist

linux-gke-5.4
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

focal Does not exist

hirsute Does not exist

impish Does not exist

bionic Not vulnerable
(5.4.0-1025.25~18.04.1)
upstream
Released (5.15~rc3)
jammy Does not exist

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

xenial Does not exist

bionic Does not exist

hirsute Does not exist

impish Does not exist

focal Not vulnerable
(5.4.0-1008.9)
upstream
Released (5.15~rc3)
jammy Does not exist

linux-gkeop-5.4
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

focal Does not exist

hirsute Does not exist

impish Does not exist

bionic Not vulnerable
(5.4.0-1001.1)
upstream
Released (5.15~rc3)
jammy Does not exist

linux-ibm
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

hirsute Does not exist

impish Does not exist

focal Not vulnerable
(5.4.0-1003.4)
upstream
Released (5.15~rc3)
jammy Not vulnerable
(5.15.0-1002.2)
linux-intel-5.13
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

hirsute Does not exist

impish Does not exist

upstream
Released (5.15~rc3)
focal Ignored
(was needs-triage now end-of-life)
jammy Does not exist

linux-oracle
Launchpad, Ubuntu, Debian
trusty Does not exist

bionic Not vulnerable
(4.15.0-1007.9)
focal Not vulnerable
(5.4.0-1005.5)
hirsute Not vulnerable
(5.8.0-1014.14+21.04.1)
impish
Released (5.13.0-1010.12)
upstream
Released (5.15~rc3)
xenial Not vulnerable
(4.15.0-1007.9~16.04.1)
jammy Not vulnerable
(5.15.0-1001.3)
linux-oracle-5.0
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Ignored
(superseded by linux-oracle-5.3)
focal Does not exist

hirsute Does not exist

impish Does not exist

upstream
Released (5.15~rc3)
jammy Does not exist

linux-oracle-5.3
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Ignored
(superseded by linux-oracle-5.4)
focal Does not exist

hirsute Does not exist

impish Does not exist

upstream
Released (5.15~rc3)
jammy Does not exist

linux-oracle-5.4
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

focal Does not exist

hirsute Does not exist

impish Does not exist

bionic Not vulnerable
(5.4.0-1019.19~18.04.1)
upstream
Released (5.15~rc3)
jammy Does not exist

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

xenial Does not exist

bionic Does not exist

hirsute Does not exist

impish Does not exist

focal Ignored
(was needs-triage now end-of-life)
upstream
Released (5.15~rc3)
jammy Does not exist

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

xenial Does not exist

bionic Does not exist

hirsute Does not exist

impish Does not exist

focal Not vulnerable
(5.11.0-1008.8~20.04.1)
upstream
Released (5.15~rc3)
jammy Does not exist

linux-oem
Launchpad, Ubuntu, Debian
trusty Does not exist

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

hirsute Does not exist

impish Does not exist

upstream
Released (5.15~rc3)
bionic Ignored
(was needs-triage now end-of-life)
jammy Does not exist

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

xenial Does not exist

bionic Does not exist

hirsute Does not exist

impish Does not exist

focal Ignored
(was needs-triage now end-of-life)
upstream
Released (5.15~rc3)
jammy Does not exist

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

xenial Does not exist

bionic Does not exist

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

impish Does not exist

upstream
Released (5.15~rc3)
jammy Does not exist

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

xenial Does not exist

bionic Does not exist

focal
Released (5.13.0-1020.24)
hirsute Does not exist

impish Does not exist

upstream
Released (5.15~rc3)
jammy Does not exist

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

xenial Does not exist

bionic Does not exist

hirsute Does not exist

impish Does not exist

focal
Released (5.14.0-1005.5)
upstream
Released (5.15~rc3)
jammy Does not exist

linux-oem-osp1
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

focal Does not exist

hirsute Does not exist

impish Does not exist

bionic Ignored
(was needs-triage now end-of-life)
upstream
Released (5.15~rc3)
jammy Does not exist

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

xenial Does not exist

bionic Does not exist

focal Not vulnerable
(5.4.0-1007.7)
hirsute Not vulnerable
(5.8.0-1008.11+21.04.1)
impish
Released (5.13.0-1011.13)
upstream
Released (5.15~rc3)
jammy Not vulnerable
(5.15.0-1002.2)
linux-raspi2
Launchpad, Ubuntu, Debian
trusty Does not exist

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

impish Does not exist

upstream
Released (5.15~rc3)
xenial Ignored
(was needs-triage now end-of-life)
bionic Not vulnerable
(4.13.0-1005.5)
jammy Does not exist

linux-raspi2-5.3
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

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

hirsute Does not exist

impish Does not exist

upstream
Released (5.15~rc3)
jammy Does not exist

linux-raspi-5.4
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Not vulnerable
(5.4.0-1013.13~18.04.1)
focal Does not exist

hirsute Does not exist

impish Does not exist

upstream
Released (5.15~rc3)
jammy Does not exist

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

xenial Does not exist

bionic Does not exist

focal Ignored
(superseded by linux-riscv-5.8)
hirsute Not vulnerable
(5.8.0-10.12+21.04.1)
impish
Released (5.13.0-1006.6)
upstream
Released (5.15~rc3)
jammy Not vulnerable
(5.13.0-1006.6+22.04.1)
linux-riscv-5.8
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

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

impish Does not exist

upstream
Released (5.15~rc3)
jammy Does not exist

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

xenial Does not exist

bionic Does not exist

focal Not vulnerable
(5.11.0-1015.16~20.04.1)
hirsute Does not exist

impish Does not exist

upstream
Released (5.15~rc3)
jammy Does not exist

linux-snapdragon
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Ignored
(was needs-triage now end-of-life)
bionic Not vulnerable
(4.4.0-1077.82)
focal Does not exist

hirsute Does not exist

impish Does not exist

upstream
Released (5.15~rc3)
jammy Does not exist

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

xenial Does not exist

bionic Does not exist

focal Not vulnerable
(5.13.0-1009.10~20.04.2)
impish Does not exist

upstream
Released (5.15~rc3)
jammy Does not exist

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

xenial Does not exist

bionic Does not exist

focal
Released (5.13.0-22.22~20.04.1)
impish Does not exist

upstream
Released (5.15~rc3)
jammy Does not exist

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

xenial Does not exist

bionic Does not exist

focal Not vulnerable
(5.13.0-1008.9~20.04.2)
impish Does not exist

upstream
Released (5.15~rc3)
jammy Does not exist

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

xenial Not vulnerable
(4.4.0-1074.80)
bionic Does not exist

focal Does not exist

hirsute Does not exist

impish Does not exist

upstream
Released (5.15~rc3)
jammy Does not exist

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

xenial Does not exist

bionic Does not exist

impish Does not exist

focal Not vulnerable
(5.13.0-1011.13~20.04.2)
upstream
Released (5.15~rc3)
jammy Does not exist

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

xenial Does not exist

bionic Does not exist

impish Does not exist

focal Not vulnerable
(5.13.0-1008.9~20.04.3)
upstream
Released (5.15~rc3)
jammy Does not exist

linux-ibm-5.4
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

focal Does not exist

impish Does not exist

bionic Not vulnerable
(5.4.0-1010.11~18.04.2)
upstream
Released (5.15~rc3)
jammy Does not exist

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

xenial Does not exist

bionic Does not exist

focal Not vulnerable
(5.4.0-1063.66+cvm2.2)
impish Does not exist

upstream
Released (5.15~rc3)
jammy Does not exist

linux-lowlatency
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

focal Does not exist

impish Does not exist

jammy Not vulnerable
(5.15.0-22.22)
upstream
Released (5.15~rc3)
linux-oem-5.17
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

focal Does not exist

impish Does not exist

jammy Not vulnerable
(5.17.0-1003.3)
upstream
Released (5.15~rc3)
linux-intel-iotg
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

focal Does not exist

impish Does not exist

jammy Not vulnerable

upstream Needs triage

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

xenial Does not exist

bionic Does not exist

focal Not vulnerable

impish Does not exist

jammy Does not exist

upstream Needs triage