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CVE-2016-2383

Published: 15 February 2016

The adjust_branches function in kernel/bpf/verifier.c in the Linux kernel before 4.5 does not consider the delta in the backward-jump case, which allows local users to obtain sensitive information from kernel memory by creating a packet filter and then loading crafted BPF instructions.

From the Ubuntu security team

It was discovered that the extended Berkeley Packet Filter (eBPF) implementation in the Linux kernel did not correctly compute branch offsets for backward jumps after ctx expansion. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.

Notes

AuthorNote
jdstrand
android kernels (flo, goldfish, grouper, maguro, mako and manta) are
not supported on the Ubuntu Touch 14.10 and earlier preview kernels
linux-lts-saucy no longer receives official support
linux-lts-quantal no longer receives official support
Priority

Low

CVSS 3 base score: 5.5

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
precise Not vulnerable

trusty Not vulnerable

upstream
Released (4.5~rc4)
vivid Not vulnerable

wily
Released (4.2.0-35.40)
xenial Not vulnerable
(4.4.0-11.26)
yakkety Not vulnerable
(4.4.0-21.37)
Patches:
Introduced by

9bac3d6d548e5cc925570b263f35b70a00a00ffd

Fixed by a1b14d27ed0965838350f1377ff97c93ee383492
linux-armadaxp
Launchpad, Ubuntu, Debian
precise Not vulnerable

trusty Does not exist

upstream
Released (4.5~rc4)
vivid Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

This package is not directly supported by the Ubuntu Security Team
linux-aws
Launchpad, Ubuntu, Debian
precise Does not exist

trusty Not vulnerable
(4.4.0-1002.2)
upstream
Released (4.5~rc4)
xenial Not vulnerable
(4.4.0-1001.10)
yakkety Does not exist

linux-flo
Launchpad, Ubuntu, Debian
precise Does not exist

trusty Does not exist
(trusty was ignored)
upstream
Released (4.5~rc4)
vivid Not vulnerable

wily Not vulnerable

xenial Not vulnerable

yakkety Not vulnerable

linux-fsl-imx51
Launchpad, Ubuntu, Debian
precise Does not exist

trusty Does not exist

upstream
Released (4.5~rc4)
vivid Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

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

trusty Does not exist

upstream
Released (4.5~rc4)
xenial Not vulnerable
(4.4.0-1003.3)
yakkety Does not exist

linux-goldfish
Launchpad, Ubuntu, Debian
precise Does not exist

trusty Does not exist
(trusty was ignored)
upstream
Released (4.5~rc4)
vivid Not vulnerable

wily Not vulnerable

xenial Not vulnerable

yakkety Not vulnerable

linux-grouper
Launchpad, Ubuntu, Debian
precise Does not exist

trusty Does not exist
(trusty was ignored)
upstream
Released (4.5~rc4)
vivid Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

linux-hwe
Launchpad, Ubuntu, Debian
precise Does not exist

trusty Does not exist

upstream
Released (4.5~rc4)
xenial Not vulnerable
(4.8.0-36.36~16.04.1)
yakkety Does not exist

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

trusty Does not exist

upstream
Released (4.5~rc4)
xenial Not vulnerable
(4.8.0-36.36~16.04.1)
yakkety Does not exist

linux-linaro-omap
Launchpad, Ubuntu, Debian
precise Ignored
(abandoned)
trusty Does not exist

upstream
Released (4.5~rc4)
vivid Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

linux-linaro-shared
Launchpad, Ubuntu, Debian
precise Ignored
(abandoned)
trusty Does not exist

upstream
Released (4.5~rc4)
vivid Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

linux-linaro-vexpress
Launchpad, Ubuntu, Debian
precise Ignored
(abandoned)
trusty Does not exist

upstream
Released (4.5~rc4)
vivid Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

linux-lts-quantal
Launchpad, Ubuntu, Debian
precise Ignored
(end-of-life)
trusty Does not exist

upstream
Released (4.5~rc4)
vivid Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

This package is not directly supported by the Ubuntu Security Team
linux-lts-raring
Launchpad, Ubuntu, Debian
precise Ignored
(end-of-life)
trusty Does not exist

upstream
Released (4.5~rc4)
vivid Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

linux-lts-saucy
Launchpad, Ubuntu, Debian
precise Ignored
(end-of-life)
trusty Does not exist

upstream
Released (4.5~rc4)
vivid Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

This package is not directly supported by the Ubuntu Security Team
linux-lts-trusty
Launchpad, Ubuntu, Debian
precise Not vulnerable

trusty Does not exist

upstream
Released (4.5~rc4)
vivid Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

linux-lts-utopic
Launchpad, Ubuntu, Debian
precise Does not exist

trusty Does not exist
(trusty was not-affected)
upstream
Released (4.5~rc4)
vivid Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

linux-lts-vivid
Launchpad, Ubuntu, Debian
precise Does not exist

trusty Does not exist
(trusty was not-affected)
upstream
Released (4.5~rc4)
vivid Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

linux-lts-wily
Launchpad, Ubuntu, Debian
precise Does not exist

trusty Does not exist
(trusty was released [4.2.0-35.40~14.04.1])
upstream
Released (4.5~rc4)
vivid Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

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

trusty Not vulnerable
(4.4.0-13.29~14.04.1)
upstream
Released (4.5~rc4)
vivid Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

linux-maguro
Launchpad, Ubuntu, Debian
precise Does not exist

trusty Does not exist
(trusty was ignored)
upstream
Released (4.5~rc4)
vivid Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

linux-mako
Launchpad, Ubuntu, Debian
precise Does not exist

trusty Does not exist
(trusty was ignored)
upstream
Released (4.5~rc4)
vivid Not vulnerable

wily Not vulnerable

xenial Not vulnerable

yakkety Not vulnerable

linux-manta
Launchpad, Ubuntu, Debian
precise Does not exist

trusty Does not exist
(trusty was ignored)
upstream
Released (4.5~rc4)
vivid Not vulnerable

wily Not vulnerable

xenial Does not exist

yakkety Does not exist

linux-qcm-msm
Launchpad, Ubuntu, Debian
precise Ignored
(abandoned)
trusty Does not exist

upstream
Released (4.5~rc4)
vivid Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist

linux-raspi2
Launchpad, Ubuntu, Debian
precise Does not exist

trusty Does not exist

upstream
Released (4.5~rc4)
vivid Does not exist

wily
Released (4.2.0-1028.36)
xenial Not vulnerable
(4.4.0-1004.5)
yakkety Not vulnerable
(4.4.0-1009.10)
linux-snapdragon
Launchpad, Ubuntu, Debian
precise Does not exist

trusty Does not exist

upstream
Released (4.5~rc4)
wily Does not exist

xenial Not vulnerable
(4.4.0-1012.12)
yakkety Not vulnerable
(4.4.0-1012.12)
linux-ti-omap4
Launchpad, Ubuntu, Debian
precise Not vulnerable

trusty Does not exist

upstream
Released (4.5~rc4)
vivid Does not exist

wily Does not exist

xenial Does not exist

yakkety Does not exist