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CVE-2020-27171

Published: 18 March 2021

An issue was discovered in the Linux kernel before 5.11.8. kernel/bpf/verifier.c has an off-by-one error (with a resultant integer underflow) affecting out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory, aka CID-10d2bb2e6b1d.

From the Ubuntu security team

Piotr Krysiuk discovered that the BPF subsystem in the Linux kernel did not properly compute a speculative execution limit on pointer arithmetic in some situations. A local attacker could use this to expose sensitive information (kernel memory).

Priority

High

CVSS 3 base score: 6.0

Status

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

xenial Does not exist

bionic Does not exist

focal Not vulnerable
(5.8.0-1035.37~20.04.1)
groovy Does not exist

hirsute Does not exist

upstream
Released (5.12~rc5)
impish Does not exist

jammy Does not exist

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

xenial Does not exist

bionic Does not exist

groovy Does not exist

hirsute Does not exist

focal Not vulnerable
(5.8.0-1033.35~20.04.1)
upstream
Released (5.12~rc5)
impish Does not exist

jammy Does not exist

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

xenial Does not exist

bionic Does not exist

groovy Does not exist

hirsute Does not exist

focal Not vulnerable
(5.8.0-1032.34~20.04.1)
upstream
Released (5.12~rc5)
impish Does not exist

jammy Does not exist

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

xenial Does not exist

bionic Does not exist

groovy Does not exist

hirsute Does not exist

focal Not vulnerable
(5.8.0-1031.32~20.04.2)
upstream
Released (5.12~rc5)
impish Does not exist

jammy Does not exist

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

xenial Does not exist

bionic Does not exist

groovy Does not exist

hirsute Does not exist

upstream
Released (5.12~rc5)
focal
Released (5.8.0-20.22~20.04.1)
impish Does not exist

jammy Does not exist

linux-hwe-5.11
Launchpad, Ubuntu, Debian
focal Not vulnerable
(5.11.0-22.23~20.04.1)
upstream
Released (5.12~rc5)
trusty Does not exist

xenial Does not exist

bionic Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

linux-riscv-5.11
Launchpad, Ubuntu, Debian
focal Not vulnerable
(5.11.0-1015.16~20.04.1)
upstream
Released (5.12~rc5)
trusty Does not exist

xenial Does not exist

bionic Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

linux-oem-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)
hirsute Does not exist

upstream
Released (5.12~rc5)
impish Does not exist

jammy Does not exist

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

xenial Does not exist

bionic Does not exist

focal Not vulnerable
(5.11.0-1009.9~20.04.2)
hirsute Does not exist

upstream
Released (5.12~rc5)
impish Does not exist

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 (5.12~rc5)
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 (5.12~rc5)
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

upstream
Released (5.12~rc5)
focal
Released (5.4.0-1011.14)
impish Does not exist

jammy Does not exist

linux
Launchpad, Ubuntu, Debian
impish Not vulnerable
(5.11.0-16.17)
precise Ignored
(end of ESM support, was needs-triage)
trusty Not vulnerable
(3.11.0-12.19)
bionic
Released (4.15.0-140.144)
hirsute Not vulnerable
(5.11.0-13.14)
focal
Released (5.4.0-70.78)
groovy
Released (5.8.0-48.54)
upstream
Released (5.12~rc5)
xenial Ignored
(was needs-triage now end-of-life)
jammy Not vulnerable
(5.13.0-19.19)
linux-hwe
Launchpad, Ubuntu, Debian
impish Does not exist

precise Does not exist

trusty Does not exist

xenial
Released (4.15.0-140.144~16.04.1)
focal Does not exist

groovy Does not exist

hirsute Does not exist

bionic
Released (5.3.0-72.68)
upstream
Released (5.12~rc5)
jammy Does not exist

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

precise Does not exist

trusty Does not exist

xenial Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

bionic
Released (5.4.0-70.78~18.04.1)
upstream
Released (5.12~rc5)
jammy Does not exist

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

precise Does not exist

trusty Does not exist

xenial Does not exist

bionic Does not exist

groovy Does not exist

hirsute Does not exist

focal
Released (5.8.0-48.54~20.04.1)
upstream
Released (5.12~rc5)
jammy Does not exist

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

precise Does not exist

trusty Does not exist

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

groovy Does not exist

hirsute Does not exist

upstream
Released (5.12~rc5)
jammy Does not exist

linux-lts-trusty
Launchpad, Ubuntu, Debian
impish Does not exist

precise Ignored
(end of ESM support, was needs-triage)
trusty Does not exist

xenial Does not exist

bionic Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

upstream
Released (5.12~rc5)
jammy Does not exist

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

precise Does not exist

trusty Needed

xenial Does not exist

bionic Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

upstream
Released (5.12~rc5)
jammy Does not exist

linux-kvm
Launchpad, Ubuntu, Debian
impish Not vulnerable
(5.11.0-1006.6)
precise Does not exist

trusty Does not exist

bionic
Released (4.15.0-1088.90)
focal
Released (5.4.0-1036.37)
groovy
Released (5.8.0-1022.24)
hirsute Not vulnerable
(5.11.0-1003.3)
upstream
Released (5.12~rc5)
xenial Ignored
(was needs-triage now end-of-life)
jammy Not vulnerable
(5.13.0-1004.4)
linux-aws
Launchpad, Ubuntu, Debian
impish Not vulnerable
(5.11.0-1006.6)
precise Does not exist

trusty Needed

bionic
Released (4.15.0-1097.104)
focal
Released (5.4.0-1041.43)
groovy
Released (5.8.0-1027.29)
hirsute Not vulnerable
(5.11.0-1003.3)
upstream
Released (5.12~rc5)
xenial Ignored
(was needs-triage now end-of-life)
jammy Not vulnerable
(5.13.0-1005.6)
linux-aws-5.0
Launchpad, Ubuntu, Debian
impish Does not exist

precise Does not exist

trusty Does not exist

xenial Does not exist

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

groovy Does not exist

hirsute Does not exist

upstream
Released (5.12~rc5)
jammy Does not exist

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

precise Does not exist

trusty Does not exist

xenial Does not exist

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

groovy Does not exist

hirsute Does not exist

upstream
Released (5.12~rc5)
jammy Does not exist

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

precise Does not exist

trusty Does not exist

xenial Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

bionic
Released (5.4.0-1041.43~18.04.1)
upstream
Released (5.12~rc5)
jammy Does not exist

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

upstream
Released (5.12~rc5)
precise Does not exist

trusty Does not exist

xenial
Released (4.15.0-1097.104~16.04.1)
bionic Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

jammy Does not exist

linux-azure
Launchpad, Ubuntu, Debian
impish Not vulnerable
(5.11.0-1004.4)
upstream
Released (5.12~rc5)
precise Does not exist

trusty
Released (4.15.0-1111.123~14.04.1)
xenial
Released (4.15.0-1111.123~16.04.1)
bionic Ignored
(superseded by linux-azure-5.3)
hirsute Not vulnerable
(5.11.0-1002.2)
focal
Released (5.4.0-1043.45)
groovy
Released (5.8.0-1026.28)
jammy Not vulnerable
(5.13.0-1006.7)
linux-azure-4.15
Launchpad, Ubuntu, Debian
impish Does not exist

upstream
Released (5.12~rc5)
precise Does not exist

trusty Does not exist

xenial Does not exist

bionic
Released (4.15.0-1111.123)
focal Does not exist

groovy Does not exist

hirsute Does not exist

jammy Does not exist

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

precise Does not exist

trusty Does not exist

xenial Does not exist

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

groovy Does not exist

hirsute Does not exist

upstream
Released (5.12~rc5)
jammy Does not exist

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

precise Does not exist

trusty Does not exist

xenial Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

bionic
Released (5.4.0-1043.45~18.04.1)
upstream
Released (5.12~rc5)
jammy Does not exist

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

precise Does not exist

trusty Does not exist

xenial Does not exist

bionic
Released (4.15.0-1015.19)
focal Does not exist

groovy Does not exist

hirsute Does not exist

upstream
Released (5.12~rc5)
jammy Does not exist

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

precise Does not exist

trusty Does not exist

xenial Does not exist

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

groovy Does not exist

hirsute Does not exist

upstream
Released (5.12~rc5)
jammy Does not exist

linux-gcp
Launchpad, Ubuntu, Debian
impish Not vulnerable
(5.11.0-1006.6)
precise Does not exist

trusty Does not exist

xenial
Released (4.15.0-1096.109~16.04.1)
bionic Ignored
(superseded by linux-gcp-5.3)
focal
Released (5.4.0-1040.43)
groovy
Released (5.8.0-1026.27)
hirsute Not vulnerable
(5.11.0-1003.3)
upstream
Released (5.12~rc5)
jammy Not vulnerable
(5.13.0-1005.6)
linux-gcp-4.15
Launchpad, Ubuntu, Debian
impish Does not exist

precise Does not exist

trusty Does not exist

xenial Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

bionic
Released (4.15.0-1096.109)
upstream
Released (5.12~rc5)
jammy Does not exist

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

precise Does not exist

trusty Does not exist

xenial Does not exist

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

groovy Does not exist

hirsute Does not exist

upstream
Released (5.12~rc5)
jammy Does not exist

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

precise Does not exist

trusty Does not exist

xenial Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

bionic
Released (5.4.0-1040.43~18.04.1)
upstream
Released (5.12~rc5)
jammy Does not exist

linux-gcp-edge
Launchpad, Ubuntu, Debian
impish Does not exist

precise Does not exist

trusty Does not exist

xenial Does not exist

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

groovy Does not exist

hirsute Does not exist

upstream
Released (5.12~rc5)
jammy Does not exist

linux-gke-4.15
Launchpad, Ubuntu, Debian
impish Does not exist

precise Does not exist

trusty Does not exist

xenial Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

bionic Ignored
(was needs-triage now end-of-life)
upstream
Released (5.12~rc5)
jammy Does not exist

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

upstream
Released (5.12~rc5)
precise Does not exist

trusty Does not exist

xenial Does not exist

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

groovy Does not exist

hirsute Does not exist

jammy Does not exist

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

upstream
Released (5.12~rc5)
precise Does not exist

trusty Does not exist

xenial Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

bionic
Released (5.3.0-1041.44)
jammy Does not exist

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

upstream
Released (5.12~rc5)
precise Does not exist

trusty Does not exist

xenial Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

bionic
Released (5.4.0-1039.41~18.04.1)
jammy Does not exist

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

upstream
Released (5.12~rc5)
precise Does not exist

trusty Does not exist

xenial Does not exist

bionic Does not exist

groovy Does not exist

hirsute Does not exist

focal
Released (5.4.0-1012.13)
jammy Does not exist

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

upstream
Released (5.12~rc5)
precise Does not exist

trusty Does not exist

xenial Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

bionic
Released (5.4.0-1012.13~18.04.1)
jammy Does not exist

linux-oracle
Launchpad, Ubuntu, Debian
impish Not vulnerable
(5.11.0-1005.5)
precise Does not exist

trusty Does not exist

xenial
Released (4.15.0-1068.76~16.04.1)
bionic
Released (4.15.0-1068.76)
focal
Released (5.4.0-1041.44)
groovy
Released (5.8.0-1024.25)
hirsute Not vulnerable
(5.11.0-1002.2)
upstream
Released (5.12~rc5)
jammy Not vulnerable
(5.13.0-1008.10)
linux-oracle-5.0
Launchpad, Ubuntu, Debian
impish Does not exist

precise Does not exist

trusty Does not exist

xenial Does not exist

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

groovy Does not exist

hirsute Does not exist

upstream
Released (5.12~rc5)
jammy Does not exist

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

precise Does not exist

trusty Does not exist

xenial Does not exist

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

groovy Does not exist

hirsute Does not exist

upstream
Released (5.12~rc5)
jammy Does not exist

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

precise Does not exist

trusty Does not exist

xenial Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

bionic
Released (5.4.0-1041.44~18.04.1)
upstream
Released (5.12~rc5)
jammy Does not exist

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

precise Does not exist

trusty Does not exist

xenial Ignored
(superseded by linux-hwe)
bionic Ignored
(was needs-triage now end-of-life)
focal Does not exist

groovy Does not exist

hirsute Does not exist

upstream
Released (5.12~rc5)
jammy Does not exist

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

precise Does not exist

trusty Does not exist

xenial Does not exist

bionic Does not exist

groovy Does not exist

hirsute Does not exist

focal
Released (5.6.0-1052.56)
upstream
Released (5.12~rc5)
jammy Does not exist

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

precise Does not exist

trusty Does not exist

xenial Does not exist

bionic Does not exist

groovy Does not exist

hirsute Does not exist

focal
Released (5.10.0-1019.20)
upstream
Released (5.12~rc5)
jammy Does not exist

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

precise Does not exist

trusty Does not exist

xenial Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

bionic Ignored
(was needs-triage now end-of-life)
upstream
Released (5.12~rc5)
jammy Does not exist

linux-raspi
Launchpad, Ubuntu, Debian
impish Not vulnerable
(5.11.0-1007.7)
upstream
Released (5.12~rc5)
precise Does not exist

trusty Does not exist

xenial Does not exist

bionic Does not exist

focal
Released (5.4.0-1032.35)
groovy
Released (5.8.0-1019.22)
hirsute Not vulnerable
(5.11.0-1004.4)
jammy Not vulnerable
(5.13.0-1008.9)
linux-raspi2
Launchpad, Ubuntu, Debian
impish Does not exist

upstream
Released (5.12~rc5)
precise Does not exist

trusty Does not exist

xenial Ignored
(was needs-triage now end-of-life)
bionic
Released (4.15.0-1082.87)
focal Ignored
(replaced by linux-raspi)
groovy Does not exist

hirsute Does not exist

jammy Does not exist

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

precise Does not exist

trusty Does not exist

xenial Does not exist

bionic
Released (5.3.0-1038.40)
focal Does not exist

groovy Does not exist

hirsute Does not exist

upstream
Released (5.12~rc5)
jammy Does not exist

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

upstream
Released (5.12~rc5)
precise Does not exist

trusty Does not exist

xenial Does not exist

bionic
Released (5.4.0-1032.35~18.04.1)
focal Does not exist

groovy Does not exist

hirsute Does not exist

jammy Does not exist

linux-riscv
Launchpad, Ubuntu, Debian
impish Not vulnerable
(5.11.0-1007.7)
precise Does not exist

trusty Does not exist

xenial Does not exist

bionic Does not exist

focal Ignored
(was needs-triage now end-of-life)
groovy
Released (5.8.0-20.22)
hirsute Not vulnerable
(5.11.0-1004.4)
upstream
Released (5.12~rc5)
jammy Not vulnerable
(5.13.0-1004.4)
linux-snapdragon
Launchpad, Ubuntu, Debian
impish Does not exist

precise Does not exist

trusty Does not exist

bionic
Released (4.15.0-1099.108)
focal Does not exist

groovy Does not exist

hirsute Does not exist

upstream
Released (5.12~rc5)
xenial Ignored
(was needs-triage now end-of-life)
jammy Does not exist

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

precise Does not exist

trusty Does not exist

bionic Does not exist

groovy Does not exist

hirsute Does not exist

jammy Not vulnerable
(5.15.0-1002.2)
upstream
Released (5.12~rc5)
xenial Ignored
(reached end of standard support)
focal
Released (5.4.0-1039.41)
linux-ibm
Launchpad, Ubuntu, Debian
impish Does not exist

trusty Does not exist

xenial Does not exist

bionic Does not exist

hirsute Does not exist

upstream
Released (5.12~rc5)
focal Not vulnerable
(5.4.0-1003.4)
jammy Not vulnerable
(5.15.0-1002.2)
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

focal Not vulnerable
(5.11.0-1009.10~20.04.1)
upstream
Released (5.12~rc5)
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 (5.12~rc5)
jammy Does not exist

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

xenial Does not exist

bionic Does not exist

focal Not vulnerable

hirsute Does not exist

impish Does not exist

upstream
Released (5.12~rc5)
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 Not vulnerable
(5.13.0-1009.10~20.04.2)
upstream
Released (5.12~rc5)
jammy Does not exist

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

xenial Does not exist

bionic Does not exist

focal Not vulnerable
(5.13.0-21.21~20.04.1)
impish Does not exist

upstream
Released (5.12~rc5)
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 (5.12~rc5)
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 (5.12~rc5)
xenial Needed

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 (5.12~rc5)
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 (5.12~rc5)
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 (5.12~rc5)
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 (5.12~rc5)
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

Notes

AuthorNote
amurray
According to the upstream advisory, 10d2bb2e6b1d8c4576c56a748f697dbeb8388899 is the minimal fix but the whole series should be applied together

References

Bugs