CVE-2015-2666

Published: 25 March 2015

Stack-based buffer overflow in the get_matching_model_microcode function in arch/x86/kernel/cpu/microcode/intel_early.c in the Linux kernel before 4.0 allows context-dependent attackers to gain privileges by constructing a crafted microcode header and leveraging root privileges for write access to the initrd.

From the Ubuntu security team

A stack overflow was discovered in the the microcode loader for the intel x86 platform. A local attacker could exploit this flaw to cause a denial of service (kernel crash) or to potentially execute code with kernel privileges.

Priority

Medium

Status

Package Release Status
linux
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc1)
Ubuntu 14.04 ESM (Trusty Tahr)
Released (3.13.0-51.84)
Patches:
Introduced by ec400ddeff200b068ddc6c70f7321f49ecf32ed5
Fixed by f84598bd7c851f8b0bf8cd0d7c3be0d73c432ff4
linux-armadaxp
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc1)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

This package is not directly supported by the Ubuntu Security Team
linux-ec2
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc1)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-flo
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc1)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist
(trusty was ignored)
linux-fsl-imx51
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc1)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-goldfish
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc1)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist
(trusty was ignored)
linux-grouper
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc1)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist
(trusty was ignored)
linux-linaro-omap
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc1)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-linaro-shared
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc1)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-linaro-vexpress
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc1)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-lts-quantal
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc1)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

This package is not directly supported by the Ubuntu Security Team
linux-lts-raring
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc1)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-lts-saucy
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc1)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

This package is not directly supported by the Ubuntu Security Team
linux-lts-trusty
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc1)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-lts-utopic
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc1)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist
(trusty was released [3.16.0-36.48~14.04.1])
linux-lts-vivid
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc1)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist
(trusty was not-affected [3.19.0-18.18~14.04.1])
linux-maguro
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc1)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist
(trusty was ignored)
linux-mako
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc1)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist
(trusty was ignored)
linux-manta
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc1)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist
(trusty was ignored)
linux-mvl-dove
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc1)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-qcm-msm
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc1)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-raspi2
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc1)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

linux-ti-omap4
Launchpad, Ubuntu, Debian
Upstream
Released (4.0~rc1)
Ubuntu 14.04 ESM (Trusty Tahr) Does not exist

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
sbeattie
introduced in https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ec400ddeff200b068ddc6c70f7321f49ecf32ed5 (v3.9-rc1)

References

Bugs