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CVE-2021-45095

Published: 16 December 2021

pep_sock_accept in net/phonet/pep.c in the Linux kernel through 5.15.8 has a refcount leak.

From the Ubuntu security team

It was discovered that the Phone Network protocol (PhoNet) implementation in the Linux kernel did not properly perform reference counting in some error conditions. A local attacker could possibly use this to cause a denial of service (memory exhaustion).

Priority

Medium

CVSS 3 base score: 5.5

Status

Package Release Status
linux-azure
Launchpad, Ubuntu, Debian
focal
Released (5.4.0-1073.76)
bionic Ignored
(superseded by linux-azure-5.3)
hirsute Ignored
(reached end-of-life)
impish
Released (5.13.0-1021.24)
trusty
Released (4.15.0-1134.147~14.04.1)
upstream
Released (5.16~rc6)
xenial
Released (4.15.0-1134.147~16.04.1)
jammy Not vulnerable
(5.15.0-1001.2)
linux-azure-4.15
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1134.147)
trusty Does not exist

xenial Does not exist

focal Does not exist

hirsute Does not exist

impish Does not exist

upstream
Released (5.16~rc6)
jammy Does not exist

linux-azure-5.4
Launchpad, Ubuntu, Debian
bionic
Released (5.4.0-1073.76~18.04.1)
trusty Does not exist

xenial Does not exist

focal Does not exist

hirsute Does not exist

impish Does not exist

upstream
Released (5.16~rc6)
jammy Does not exist

linux-gcp-4.15
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1119.133)
trusty Does not exist

xenial Does not exist

focal Does not exist

hirsute Does not exist

impish Does not exist

upstream
Released (5.16~rc6)
jammy Does not exist

linux-gkeop
Launchpad, Ubuntu, Debian
focal
Released (5.4.0-1037.38)
trusty Does not exist

xenial Does not exist

bionic Does not exist

hirsute Does not exist

impish Does not exist

upstream
Released (5.16~rc6)
jammy Does not exist

linux-hwe-5.4
Launchpad, Ubuntu, Debian
bionic
Released (5.4.0-105.119~18.04.1)
trusty Does not exist

xenial Does not exist

focal Does not exist

hirsute Does not exist

impish Does not exist

upstream
Released (5.16~rc6)
jammy Does not exist

linux-ibm
Launchpad, Ubuntu, Debian
focal
Released (5.4.0-1018.20)
trusty Does not exist

xenial Does not exist

bionic Does not exist

hirsute Does not exist

impish Does not exist

upstream
Released (5.16~rc6)
jammy Not vulnerable
(5.15.0-1002.2)
linux-oracle
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1090.99)
impish
Released (5.13.0-1023.28)
trusty Does not exist

hirsute Ignored
(reached end-of-life)
upstream
Released (5.16~rc6)
xenial
Released (4.15.0-1090.99~16.04.1)
focal
Released (5.4.0-1067.72)
jammy Not vulnerable
(5.15.0-1001.3)
linux-snapdragon
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1123.132)
trusty Does not exist

focal Does not exist

hirsute Does not exist

impish Does not exist

xenial Ignored
(was needs-triage now end-of-life)
upstream
Released (5.16~rc6)
jammy Does not exist

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

xenial Does not exist

bionic Does not exist

impish Does not exist

focal
Released (5.13.0-1021.24~20.04.1)
upstream
Released (5.16~rc6)
jammy Does not exist

linux-bluefield
Launchpad, Ubuntu, Debian
focal
Released (5.4.0-1032.35)
trusty Does not exist

xenial Does not exist

bionic Does not exist

hirsute Does not exist

impish Does not exist

upstream
Released (5.16~rc6)
jammy Does not exist

linux-gcp-5.13
Launchpad, Ubuntu, Debian
focal
Released (5.13.0-1021.25~20.04.1)
trusty Does not exist

xenial Does not exist

bionic Does not exist

impish Does not exist

upstream
Released (5.16~rc6)
jammy Does not exist

linux-gcp-5.4
Launchpad, Ubuntu, Debian
bionic
Released (5.4.0-1068.72~18.04.1)
trusty Does not exist

xenial Does not exist

focal Does not exist

hirsute Does not exist

impish Does not exist

upstream
Released (5.16~rc6)
jammy Does not exist

linux-oracle-5.13
Launchpad, Ubuntu, Debian
focal
Released (5.13.0-1025.30~20.04.1)
trusty Does not exist

xenial Does not exist

bionic Does not exist

impish Does not exist

upstream
Released (5.16~rc6)
jammy Does not exist

linux
Launchpad, Ubuntu, Debian
trusty Ignored
(was needed ESM criteria)
bionic
Released (4.15.0-173.182)
focal
Released (5.4.0-105.119)
hirsute Ignored
(reached end-of-life)
impish
Released (5.13.0-37.42)
upstream
Released (5.16~rc6)
xenial
Released (4.4.0-222.255)
jammy Not vulnerable
(5.15.0-22.22)
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 (5.16~rc6)
xenial
Released (4.15.0-173.182~16.04.1)
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 needs-triage now end-of-life)
upstream
Released (5.16~rc6)
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 Ignored
(was needs-triage now end-of-life)
upstream
Released (5.16~rc6)
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 (5.16~rc6)
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 (4.4.0-222.255~14.04.1)
upstream
Released (5.16~rc6)
jammy Does not exist

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

hirsute Ignored
(reached end-of-life)
upstream
Released (5.16~rc6)
xenial
Released (4.4.0-1103.112)
bionic
Released (4.15.0-1110.113)
focal
Released (5.4.0-1059.62)
impish
Released (5.13.0-1018.19)
jammy Not vulnerable
(5.15.0-1002.2)
linux-aws
Launchpad, Ubuntu, Debian
bionic
Released (4.15.0-1124.133)
focal
Released (5.4.0-1069.73)
hirsute Ignored
(reached end-of-life)
impish
Released (5.13.0-1019.21)
upstream
Released (5.16~rc6)
trusty
Released (4.4.0-1102.107)
xenial
Released (4.4.0-1138.152)
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 (5.16~rc6)
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 (5.16~rc6)
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 (5.16~rc6)
bionic
Released (5.4.0-1069.73~18.04.1)
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 (5.16~rc6)
jammy Does not exist

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

xenial Does not exist

bionic Does not exist

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

impish Does not exist

upstream
Released (5.16~rc6)
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 (5.16~rc6)
xenial
Released (4.15.0-1124.133~16.04.1)
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 (5.16~rc6)
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 (5.16~rc6)
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 (5.16~rc6)
focal Ignored
(was needed now end-of-life)
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 (5.16~rc6)
bionic
Released (4.15.0-1038.43)
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 (5.16~rc6)
jammy Does not exist

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

bionic Ignored
(superseded by linux-gcp-5.3)
hirsute Ignored
(reached end-of-life)
focal
Released (5.4.0-1068.72)
upstream
Released (5.16~rc6)
xenial
Released (4.15.0-1119.133~16.04.1)
impish
Released (5.13.0-1021.25)
jammy Not vulnerable
(5.15.0-1001.3)
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 (5.16~rc6)
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 (5.16~rc6)
jammy Does not exist

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

xenial Does not exist

bionic Does not exist

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

impish Does not exist

upstream
Released (5.16~rc6)
jammy Does not exist

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

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

focal
Released (5.4.0-1066.69)
hirsute Does not exist

impish Does not exist

upstream
Released (5.16~rc6)
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 (5.16~rc6)
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 (5.16~rc6)
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 (5.16~rc6)
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
Released (5.4.0-1066.69~18.04.1)
upstream
Released (5.16~rc6)
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
Released (5.4.0-1037.38~18.04.1)
upstream
Released (5.16~rc6)
jammy Does not exist

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 (5.16~rc6)
jammy Does not exist

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 (5.16~rc6)
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 (5.16~rc6)
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

upstream
Released (5.16~rc6)
bionic
Released (5.4.0-1067.72~18.04.1)
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 (5.16~rc6)
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 (5.16~rc6)
focal Ignored
(was needed now end-of-life)
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 (5.16~rc6)
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 (5.16~rc6)
jammy Does not exist

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

xenial Does not exist

bionic Does not exist

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

impish Does not exist

upstream
Released (5.16~rc6)
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 Ignored
(was needed now end-of-life)
upstream
Released (5.16~rc6)
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 (5.14.0-1022.24)
upstream
Released (5.16~rc6)
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 (5.16~rc6)
jammy Does not exist

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

xenial Does not exist

bionic Does not exist

focal
Released (5.4.0-1056.63)
hirsute Ignored
(reached end-of-life)
upstream
Released (5.16~rc6)
impish
Released (5.13.0-1022.24)
jammy Not vulnerable
(5.15.0-1003.3)
linux-raspi2
Launchpad, Ubuntu, Debian
trusty Does not exist

bionic
Released (4.15.0-1106.113)
focal Ignored
(replaced by linux-raspi)
hirsute Does not exist

impish Does not exist

upstream
Released (5.16~rc6)
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

upstream
Released (5.16~rc6)
bionic Ignored
(was needs-triage now end-of-life)
jammy Does not exist

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

xenial Does not exist

bionic
Released (5.4.0-1056.63~18.04.1)
focal Does not exist

hirsute Does not exist

impish Does not exist

upstream
Released (5.16~rc6)
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 Ignored
(reached end-of-life)
impish
Released (5.13.0-1017.19)
upstream
Released (5.16~rc6)
jammy Not vulnerable
(5.15.0-1004.4)
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 (5.16~rc6)
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

focal Ignored
(was needed now end-of-life)
upstream
Released (5.16~rc6)
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 (5.13.0-37.42~20.04.1)
impish Does not exist

upstream
Released (5.16~rc6)
jammy Does not exist

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

xenial Does not exist

bionic Does not exist

focal
Released (5.13.0-1019.21~20.04.1)
impish Does not exist

upstream
Released (5.16~rc6)
jammy Does not exist

linux-ibm-5.4
Launchpad, Ubuntu, Debian
bionic
Released (5.4.0-1018.20~18.04.1)
trusty Does not exist

xenial Does not exist

focal Does not exist

impish Does not exist

upstream
Released (5.16~rc6)
jammy Does not exist

linux-fips
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 (5.16~rc6)
xenial Not vulnerable
(4.4.0-1073.79)
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 Not vulnerable
(5.4.0-1063.66+cvm2.2)
upstream
Released (5.16~rc6)
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

upstream Needs triage

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

upstream Needs triage