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CVE-2021-0920

Published: 15 December 2021

In unix_scm_to_skb of af_unix.c, there is a possible use after free bug due to a race condition. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-196926917References: Upstream kernel

From the Ubuntu security team

It was discovered a race condition existed in the Unix domain socket 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) or possibly execute arbitrary code.

Priority

Medium

CVSS 3 base score: 6.4

Status

Package Release Status
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 (5.14~rc4)
xenial
Released (4.15.0-159.167~16.04.1)
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

upstream
Released (5.14~rc4)
bionic
Released (5.4.0-87.98~18.04.1)
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 Ignored
(was needed now end-of-life)
upstream
Released (5.14~rc4)
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

upstream
Released (5.14~rc4)
focal
Released (5.11.0-37.41~20.04.2)
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(superseded by linux-hwe)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(superseded by linux-hwe-5.4)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 (5.14~rc4)
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
Released (4.4.0-223.256~14.04.1)
upstream
Released (5.14~rc4)
jammy Does not exist

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

impish Not vulnerable
(5.13.0-1002.2)
upstream
Released (5.14~rc4)
xenial
Released (4.4.0-1104.113)
bionic
Released (4.15.0-1100.102)
focal
Released (5.4.0-1047.49)
hirsute
Released (5.11.0-1017.18)
jammy Not vulnerable
(5.13.0-1004.4)
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 (5.14~rc4)
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 (5.14~rc4)
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

upstream
Released (5.14~rc4)
bionic
Released (5.4.0-1057.60~18.04.1)
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 (5.14~rc4)
jammy Does not exist

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

xenial Does not exist

bionic Does not exist

focal
Released (5.11.0-1019.20~20.04.1)
hirsute Does not exist

impish Does not exist

upstream
Released (5.14~rc4)
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 (5.14~rc4)
xenial
Released (4.15.0-1112.119~16.04.1)
jammy Does not exist

linux-azure
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-azure-5.3)
impish Not vulnerable
(5.13.0-1004.5)
trusty
Released (4.15.0-1124.137~14.04.1)
upstream
Released (5.14~rc4)
focal
Released (5.4.0-1059.62)
hirsute
Released (5.11.0-1017.18)
xenial
Released (4.15.0-1124.137~16.04.1)
jammy Not vulnerable
(5.13.0-1006.7)
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

upstream
Released (5.14~rc4)
bionic
Released (4.15.0-1124.137)
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 (5.14~rc4)
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

upstream
Released (5.14~rc4)
bionic
Released (5.4.0-1059.62~18.04.1)
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 (5.14~rc4)
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

upstream
Released (5.14~rc4)
focal
Released (5.11.0-1017.18~20.04.1)
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

upstream
Released (5.14~rc4)
focal
Released (5.4.0-1019.22)
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

upstream
Released (5.14~rc4)
bionic
Released (4.15.0-1028.33)
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 (5.14~rc4)
jammy Does not exist

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

bionic Ignored
(superseded by linux-gcp-5.3)
impish Not vulnerable
(5.13.0-1003.4)
upstream
Released (5.14~rc4)
focal
Released (5.4.0-1053.57)
hirsute
Released (5.11.0-1020.22)
xenial
Released (4.15.0-1109.123~16.04.1)
jammy Not vulnerable
(5.13.0-1005.6)
linux-gcp-4.15
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic
Released (4.15.0-1109.123)
focal Does not exist

hirsute Does not exist

impish Does not exist

upstream
Released (5.14~rc4)
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 (5.14~rc4)
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 (5.14~rc4)
bionic
Released (5.4.0-1053.57~18.04.1)
jammy Does not exist

linux-gcp-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 (5.14~rc4)
jammy Does not exist

linux-gcp-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

upstream
Released (5.14~rc4)
focal
Released (5.11.0-1020.22~20.04.1)
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

upstream
Released (5.14~rc4)
focal
Released (5.4.0-1053.56)
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 (5.14~rc4)
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 (5.14~rc4)
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 (5.14~rc4)
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

upstream
Released (5.14~rc4)
bionic
Released (5.4.0-1053.56~18.04.1)
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

upstream
Released (5.14~rc4)
focal
Released (5.4.0-1024.25)
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

upstream
Released (5.14~rc4)
bionic
Released (5.4.0-1024.25~18.04.1)
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

upstream
Released (5.14~rc4)
focal
Released (5.4.0-1005.6)
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

focal Ignored
(was needs-triage now end-of-life)
upstream
Released (5.14~rc4)
jammy Does not exist

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

impish Not vulnerable
(5.13.0-1008.10)
upstream
Released (5.14~rc4)
bionic
Released (4.15.0-1081.89)
focal
Released (5.4.0-1055.59)
hirsute
Released (5.11.0-1019.20)
xenial
Released (4.15.0-1081.89~16.04.1)
jammy Not vulnerable
(5.13.0-1008.10)
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 (5.14~rc4)
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 (5.14~rc4)
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
Released (5.4.0-1055.59~18.04.1)
upstream
Released (5.14~rc4)
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 (5.14~rc4)
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

upstream
Released (5.14~rc4)
focal
Released (5.11.0-1019.20~20.04.1)
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

bionic Ignored
(was needs-triage now end-of-life)
upstream
Released (5.14~rc4)
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 (5.14~rc4)
jammy Does not exist

linux-oem-5.10
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 (5.10.0-1050.52)
upstream
Released (5.14~rc4)
jammy Does not exist

linux-oem-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

focal
Released (5.13.0-1014.18)
upstream
Released (5.14~rc4)
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 Not vulnerable
(5.14.0-1004.4)
upstream
Released (5.14~rc4)
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 (5.14~rc4)
jammy Does not exist

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

xenial Does not exist

bionic Does not exist

focal
Released (5.4.0-1044.48)
hirsute
Released (5.11.0-1019.20)
impish Not vulnerable
(5.13.0-1007.8)
upstream
Released (5.14~rc4)
jammy Not vulnerable
(5.13.0-1008.9)
linux-raspi2
Launchpad, Ubuntu, Debian
trusty Does not exist

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

impish Does not exist

bionic
Released (4.15.0-1096.102)
upstream
Released (5.14~rc4)
xenial Ignored
(was needs-triage now end-of-life)
jammy Does not exist

linux-raspi2-5.3
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 (5.14~rc4)
jammy Does not exist

linux-raspi-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
Released (5.4.0-1044.48~18.04.1)
upstream
Released (5.14~rc4)
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)
impish Not vulnerable
(5.13.0-1003.3)
upstream
Released (5.14~rc4)
hirsute
Released (5.11.0-1020.21)
jammy Not vulnerable
(5.13.0-1004.4)
linux-riscv-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 (5.14~rc4)
jammy Does not exist

linux-riscv-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

upstream
Released (5.14~rc4)
focal
Released (5.11.0-1020.21~20.04.1)
jammy Does not exist

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

focal Does not exist

hirsute Does not exist

impish Does not exist

bionic
Released (4.15.0-1113.122)
upstream
Released (5.14~rc4)
xenial Ignored
(was needs-triage now end-of-life)
jammy Does not exist

linux
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-159.167)
focal
Released (5.4.0-88.99)
impish Not vulnerable
(5.13.0-16.16)
trusty Ignored
(was needed ESM criteria)
upstream
Released (5.14~rc4)
xenial
Released (4.4.0-223.256)
hirsute
Released (5.11.0-37.41)
jammy Not vulnerable
(5.13.0-19.19)
linux-aws
Launchpad, Ubuntu, Debian
impish Not vulnerable
(5.13.0-1005.6)
trusty
Released (4.4.0-1103.108)
upstream
Released (5.14~rc4)
xenial Pending
(4.4.0-1139.153)
bionic
Released (4.15.0-1112.119)
focal
Released (5.4.0-1057.60)
hirsute
Released (5.11.0-1019.20)
jammy Not vulnerable
(5.13.0-1005.6)
linux-azure-5.13
Launchpad, Ubuntu, Debian
trusty Does not exist

xenial Does not exist

bionic Does not exist

impish Does not exist

focal Not vulnerable
(5.13.0-1009.10~20.04.2)
upstream
Released (5.14~rc4)
jammy Does not exist

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

xenial Does not exist

bionic Does not exist

impish Does not exist

focal Not vulnerable
(5.13.0-21.21~20.04.1)
upstream
Released (5.14~rc4)
jammy Does not exist

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

xenial Does not exist

bionic Does not exist

impish Does not exist

focal Not vulnerable
(5.13.0-1008.9~20.04.2)
upstream
Released (5.14~rc4)
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 (5.14~rc4)
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 (5.14~rc4)
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 (5.14~rc4)
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 (5.14~rc4)
jammy Does not exist

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

xenial Does not exist

bionic Does not exist

impish Does not exist

focal Needed

upstream
Released (5.14~rc4)
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 (5.14~rc4)
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 (5.14~rc4)
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