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CVE-2021-33624

Published: 23 June 2021

In kernel/bpf/verifier.c in the Linux kernel before 5.12.13, a branch can be mispredicted (e.g., because of type confusion) and consequently an unprivileged BPF program can read arbitrary memory locations via a side-channel attack, aka CID-9183671af6db.

From the Ubuntu security team

Ofek Kirzner, Adam Morrison, Benedict Schlueter, and Piotr Krysiuk discovered that the BPF verifier in the Linux kernel missed possible mispredicted branches due to type confusion, allowing a side-channel attack. An attacker could use this to expose sensitive information.

Priority

Medium

CVSS 3 base score: 4.7

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
bionic Needed

focal
Released (5.4.0-88.99)
groovy Ignored
(reached end-of-life)
hirsute
Released (5.11.0-37.41)
impish Not vulnerable
(5.13.0-14.14)
jammy Not vulnerable
(5.13.0-19.19)
trusty Not vulnerable
(3.11.0-12.19)
upstream
Released (5.13~rc7)
xenial Ignored
(was needed ESM criteria)
linux-aws
Launchpad, Ubuntu, Debian
bionic Needed

focal
Released (5.4.0-1057.60)
groovy Ignored
(reached end-of-life)
hirsute
Released (5.11.0-1019.20)
impish Not vulnerable
(5.13.0-1005.6)
jammy Not vulnerable
(5.13.0-1005.6)
trusty Ignored
(was needed ESM criteria)
upstream
Released (5.13~rc7)
xenial Ignored
(was needed ESM criteria)
linux-aws-5.0
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-aws-5.3)
focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
xenial Does not exist

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

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

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
xenial Does not exist

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

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

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
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(superseded by linux-aws-5.4)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

hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
xenial Does not exist

linux-aws-5.4
Launchpad, Ubuntu, Debian
bionic
Released (5.4.0-1057.60~18.04.1)
focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
xenial Does not exist

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

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

hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
xenial Does not exist

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

focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
xenial Ignored
(was needed ESM criteria)
linux-azure
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-azure-5.3)
focal
Released (5.4.0-1059.62)
groovy Ignored
(reached end-of-life)
hirsute
Released (5.11.0-1017.18)
impish Not vulnerable
(5.13.0-1004.5)
jammy Not vulnerable
(5.13.0-1006.7)
trusty Ignored
(was needed ESM criteria)
upstream
Released (5.13~rc7)
xenial Ignored
(was needed ESM criteria)
linux-azure-4.15
Launchpad, Ubuntu, Debian
bionic Needed

focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
xenial Does not exist

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

focal
Released (5.11.0-1017.18~20.04.1)
hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
xenial Does not exist

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

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

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
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

hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
xenial Does not exist

linux-azure-5.4
Launchpad, Ubuntu, Debian
bionic
Released (5.4.0-1059.62~18.04.1)
focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
xenial Does not exist

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

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

hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
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

hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
xenial Does not exist

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

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

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
xenial Does not exist

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

focal
Released (5.4.0-1019.22)
hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
xenial Does not exist

linux-dell300x
Launchpad, Ubuntu, Debian
bionic Needed

focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
xenial Does not exist

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

focal Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
xenial Ignored
(was needed ESM criteria)
linux-gcp
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-gcp-5.3)
focal
Released (5.4.0-1053.57)
groovy Ignored
(reached end-of-life)
hirsute
Released (5.11.0-1020.22)
impish Not vulnerable
(5.13.0-1003.4)
jammy Not vulnerable
(5.13.0-1005.6)
trusty Does not exist

upstream
Released (5.13~rc7)
xenial Ignored
(was needed ESM criteria)
linux-gcp-4.15
Launchpad, Ubuntu, Debian
bionic Needed

focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
xenial Does not exist

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

focal
Released (5.11.0-1020.22~20.04.1)
hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
xenial Does not exist

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

focal Not vulnerable
(5.13.0-1008.9~20.04.3)
impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
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

hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
xenial Does not exist

linux-gcp-5.4
Launchpad, Ubuntu, Debian
bionic
Released (5.4.0-1053.57~18.04.1)
focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
xenial Does not exist

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

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

hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
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

hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
xenial Does not exist

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

focal
Released (5.4.0-1053.56)
groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Not vulnerable
(5.15.0-1002.2)
trusty Does not exist

upstream
Released (5.13~rc7)
xenial Ignored
(reached end of standard support)
linux-gke-4.15
Launchpad, Ubuntu, Debian
bionic Ignored
(was needs-triage now end-of-life)
focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
xenial Does not exist

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

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
xenial Does not exist

linux-gke-5.3
Launchpad, Ubuntu, Debian
bionic Ignored
(was needed now end-of-life)
focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
xenial Does not exist

linux-gke-5.4
Launchpad, Ubuntu, Debian
bionic
Released (5.4.0-1053.56~18.04.1)
focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
xenial Does not exist

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

focal
Released (5.4.0-1024.25)
groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
xenial Does not exist

linux-gkeop-5.4
Launchpad, Ubuntu, Debian
bionic
Released (5.4.0-1024.25~18.04.1)
focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
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

hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
xenial Ignored
(was needed ESM criteria)
linux-hwe-5.11
Launchpad, Ubuntu, Debian
bionic Does not exist

focal
Released (5.11.0-37.41~20.04.2)
hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
xenial Does not exist

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

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

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
xenial Does not exist

linux-hwe-5.4
Launchpad, Ubuntu, Debian
bionic
Released (5.4.0-87.98~18.04.1)
focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
xenial Does not exist

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

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

hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
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

hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
xenial Ignored
(superseded by linux-hwe)
linux-ibm
Launchpad, Ubuntu, Debian
bionic Does not exist

focal
Released (5.4.0-1005.6)
hirsute Does not exist

impish Does not exist

jammy Not vulnerable
(5.15.0-1002.2)
trusty Does not exist

upstream
Released (5.13~rc7)
xenial Does not exist

linux-ibm-5.4
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(5.4.0-1010.11~18.04.2)
focal Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
xenial Does not exist

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

focal Not vulnerable

hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
xenial Does not exist

linux-kvm
Launchpad, Ubuntu, Debian
bionic Needed

focal
Released (5.4.0-1047.49)
groovy Ignored
(reached end-of-life)
hirsute
Released (5.11.0-1017.18)
impish Not vulnerable
(5.13.0-1001.1)
jammy Not vulnerable
(5.13.0-1004.4)
trusty Does not exist

upstream
Released (5.13~rc7)
xenial Ignored
(was needed ESM criteria)
linux-lowlatency
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Does not exist

impish Does not exist

jammy Not vulnerable

trusty Does not exist

upstream Needs triage

xenial Does not exist

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

focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Ignored
(was needed ESM criteria)
upstream
Released (5.13~rc7)
xenial Does not exist

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

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
xenial Ignored
(superseded by linux-hwe)
linux-oem-5.10
Launchpad, Ubuntu, Debian
bionic Does not exist

focal
Released (5.10.0-1050.52)
groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
xenial Does not exist

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

focal Not vulnerable
(5.13.0-1009.10)
hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
xenial Does not exist

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

focal Not vulnerable
(5.14.0-1004.4)
hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
xenial Does not exist

linux-oem-5.17
Launchpad, Ubuntu, Debian
bionic Does not exist

focal Does not exist

impish Does not exist

jammy Not vulnerable

trusty Does not exist

upstream Needs triage

xenial Does not exist

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

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

hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
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

hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
xenial Does not exist

linux-oracle
Launchpad, Ubuntu, Debian
bionic Needed

focal
Released (5.4.0-1055.59)
groovy Ignored
(reached end-of-life)
hirsute
Released (5.11.0-1019.20)
impish Not vulnerable
(5.13.0-1008.10)
jammy Not vulnerable
(5.13.0-1008.10)
trusty Does not exist

upstream
Released (5.13~rc7)
xenial Ignored
(was needed ESM criteria)
linux-oracle-5.0
Launchpad, Ubuntu, Debian
bionic Ignored
(superseded by linux-oracle-5.3)
focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
xenial Does not exist

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

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

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
xenial Does not exist

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

focal Not vulnerable
(5.13.0-1011.13~20.04.2)
impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
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

hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
xenial Does not exist

linux-oracle-5.4
Launchpad, Ubuntu, Debian
bionic
Released (5.4.0-1055.59~18.04.1)
focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
xenial Does not exist

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

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

hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
xenial Does not exist

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

focal
Released (5.4.0-1044.48)
groovy Ignored
(reached end-of-life)
hirsute
Released (5.11.0-1019.20)
impish Not vulnerable
(5.13.0-1006.7)
jammy Not vulnerable
(5.13.0-1008.9)
trusty Does not exist

upstream
Released (5.13~rc7)
xenial Does not exist

linux-raspi-5.4
Launchpad, Ubuntu, Debian
bionic
Released (5.4.0-1044.48~18.04.1)
focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
xenial Does not exist

linux-raspi2
Launchpad, Ubuntu, Debian
bionic Needed

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

hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
xenial Ignored
(was needs-triage now end-of-life)
linux-raspi2-5.3
Launchpad, Ubuntu, Debian
bionic Ignored
(was needed now end-of-life)
focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
xenial Does not exist

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

focal Ignored
(was needs-triage now end-of-life)
groovy Ignored
(reached end-of-life)
hirsute
Released (5.11.0-1020.21)
impish Not vulnerable
(5.13.0-1002.2)
jammy Not vulnerable
(5.13.0-1004.4)
trusty Does not exist

upstream
Released (5.13~rc7)
xenial Does not exist

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

focal
Released (5.11.0-1020.21~20.04.1)
hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
xenial Does not exist

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

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

hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
xenial Does not exist

linux-snapdragon
Launchpad, Ubuntu, Debian
bionic Needed

focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

trusty Does not exist

upstream
Released (5.13~rc7)
xenial Ignored
(was needs-triage now end-of-life)