CVE-2015-6526

NameCVE-2015-6526
DescriptionThe perf_callchain_user_64 function in arch/powerpc/perf/callchain.c in the Linux kernel before 4.0.2 on ppc64 platforms allows local users to cause a denial of service (infinite loop) via a deep 64-bit userspace backtrace.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severitymedium (attack range: local)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
linux (PTS)wheezy3.2.78-1fixed
wheezy (security)3.2.96-3fixed
jessie3.16.51-2fixed
jessie (security)3.16.51-3+deb8u1fixed
stretch4.9.65-3fixed
stretch (security)4.9.65-3+deb9u2fixed
buster, sid4.14.13-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
linuxsource(unstable)4.1.3-1medium
linuxsourcejessie3.16.7-ckt11-1medium
linuxsourcewheezy3.2.71-1medium
linux-2.6source(unstable)(unfixed)medium
linux-2.6sourcesqueeze(not affected)

Notes

[squeeze] - linux-2.6 <not-affected> (powerpc not supported in Squeeze LTS)
http://www.openwall.com/lists/oss-security/2015/08/18/4
Fixed by: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9a5cbce421a283e6aea3c4007f141735bf9da8c3 (v4.1-rc1)

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