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CVE-2016-8650

Published: 27 November 2016

The mpi_powm function in lib/mpi/mpi-pow.c in the Linux kernel through 4.8.11 does not ensure that memory is allocated for limb data, which allows local users to cause a denial of service (stack memory corruption and panic) via an add_key system call for an RSA key with a zero exponent.

From the Ubuntu security team

Sergej Schumilo, Ralf Spenneberg, and Hendrik Schwartke discovered that the key management subsystem in the Linux kernel did not properly allocate memory in some situations. A local attacker could use this to cause a denial of service (system crash).

Priority

Medium

CVSS 3 base score: 5.5

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc7)
Patches:
Introduced by cdec9cb5167ab1113ba9c58e395f664d9d3f9acb
Fixed by f5527fffff3f002b0a6b376163613b82f69de073
linux-armadaxp
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc7)
This package is not directly supported by the Ubuntu Security Team
linux-aws
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc7)
linux-azure
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc7)
linux-euclid
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc7)
linux-flo
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc7)
linux-gcp
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc7)
linux-gke
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc7)
linux-goldfish
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc7)
linux-grouper
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc7)
linux-hwe
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc7)
linux-hwe-edge
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc7)
linux-kvm
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc7)
linux-linaro-omap
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc7)
linux-linaro-shared
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc7)
linux-linaro-vexpress
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc7)
linux-lts-quantal
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc7)
This package is not directly supported by the Ubuntu Security Team
linux-lts-raring
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc7)
linux-lts-saucy
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc7)
This package is not directly supported by the Ubuntu Security Team
linux-lts-trusty
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc7)
linux-lts-utopic
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc7)
linux-lts-vivid
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc7)
linux-lts-wily
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc7)
linux-lts-xenial
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc7)
linux-maguro
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc7)
linux-mako
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc7)
linux-manta
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc7)
linux-oem
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc7)
linux-qcm-msm
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc7)
linux-raspi2
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc7)
linux-snapdragon
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc7)
linux-ti-omap4
Launchpad, Ubuntu, Debian
Upstream
Released (4.9~rc7)

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

References

Bugs