CVE-2016-5195

NameCVE-2016-5195
DescriptionRace condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect handling of a copy-on-write (COW) feature to write to a read-only memory mapping, as exploited in the wild in October 2016, aka "Dirty COW."
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SuSE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-670-1, DSA-3696-1
NVD severityhigh (attack range: local)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
linux (PTS)wheezy3.2.78-1vulnerable
wheezy (security)3.2.86-1fixed
jessie3.16.39-1fixed
jessie (security)3.16.39-1+deb8u2fixed
stretch, sid4.9.18-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
linuxsource(unstable)4.7.8-1high
linuxsourcejessie3.16.36-1+deb8u2highDSA-3696-1
linuxsourcewheezy3.2.82-1highDLA-670-1

Notes

https://github.com/dirtycow/dirtycow.github.io/wiki/VulnerabilityDetails
Fixed by: https://git.kernel.org/linus/19be0eaffa3ac7d8eb6784ad9bdbc7d67ed8e619

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