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CVE-2015-7872

Published: 16 November 2015

The key_gc_unused_keys function in security/keys/gc.c in the Linux kernel through 4.2.6 allows local users to cause a denial of service (OOPS) via crafted keyctl commands.

From the Ubuntu Security Team

Dmitry Vyukov discovered that the Linux kernel's keyring handler attempted to garbage collect incompletely instantiated keys. A local unprivileged attacker could use this to cause a denial of service (system crash).

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
kamal
Per the oss-security discussion and the author's commit notes,
911b79cde is not actually a security issue, so removed its break-fix.
Priority

Medium

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
upstream
Released (4.3~rc7)
Patches:
Introduced by

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2

Fixed by f05819df10d7b09f6d1eb6f8534a8f68e5a4fe61
linux-armadaxp
Launchpad, Ubuntu, Debian
upstream
Released (4.3~rc7)
This package is not directly supported by the Ubuntu Security Team
linux-aws
Launchpad, Ubuntu, Debian
upstream
Released (4.3~rc7)
linux-ec2
Launchpad, Ubuntu, Debian
upstream
Released (4.3~rc7)
linux-flo
Launchpad, Ubuntu, Debian
upstream
Released (4.3~rc7)
linux-fsl-imx51
Launchpad, Ubuntu, Debian
upstream
Released (4.3~rc7)
linux-gke
Launchpad, Ubuntu, Debian
upstream
Released (4.3~rc7)
linux-goldfish
Launchpad, Ubuntu, Debian
upstream
Released (4.3~rc7)
linux-grouper
Launchpad, Ubuntu, Debian
upstream
Released (4.3~rc7)
linux-hwe
Launchpad, Ubuntu, Debian
upstream
Released (4.3~rc7)
linux-hwe-edge
Launchpad, Ubuntu, Debian
upstream
Released (4.3~rc7)
linux-linaro-omap
Launchpad, Ubuntu, Debian
upstream
Released (4.3~rc7)
linux-linaro-shared
Launchpad, Ubuntu, Debian
upstream
Released (4.3~rc7)
linux-linaro-vexpress
Launchpad, Ubuntu, Debian
upstream
Released (4.3~rc7)
linux-lts-quantal
Launchpad, Ubuntu, Debian
upstream
Released (4.3~rc7)
This package is not directly supported by the Ubuntu Security Team
linux-lts-raring
Launchpad, Ubuntu, Debian
upstream
Released (4.3~rc7)
linux-lts-saucy
Launchpad, Ubuntu, Debian
upstream
Released (4.3~rc7)
This package is not directly supported by the Ubuntu Security Team
linux-lts-trusty
Launchpad, Ubuntu, Debian
upstream
Released (4.3~rc7)
linux-lts-utopic
Launchpad, Ubuntu, Debian
upstream
Released (4.3~rc7)
linux-lts-vivid
Launchpad, Ubuntu, Debian
upstream
Released (4.3~rc7)
linux-lts-wily
Launchpad, Ubuntu, Debian
upstream
Released (4.3~rc7)
linux-lts-xenial
Launchpad, Ubuntu, Debian
upstream
Released (4.3~rc7)
linux-maguro
Launchpad, Ubuntu, Debian
upstream
Released (4.3~rc7)
linux-mako
Launchpad, Ubuntu, Debian
upstream
Released (4.3~rc7)
linux-manta
Launchpad, Ubuntu, Debian
upstream
Released (4.3~rc7)
linux-mvl-dove
Launchpad, Ubuntu, Debian
upstream
Released (4.3~rc7)
linux-qcm-msm
Launchpad, Ubuntu, Debian
upstream
Released (4.3~rc7)
linux-raspi2
Launchpad, Ubuntu, Debian
upstream
Released (4.3~rc7)
linux-snapdragon
Launchpad, Ubuntu, Debian
upstream
Released (4.3~rc7)
linux-ti-omap4
Launchpad, Ubuntu, Debian
upstream
Released (4.3~rc7)