DescriptionThe (1) BPF_S_ANC_NLATTR and (2) BPF_S_ANC_NLATTR_NEST extension implementations in the sk_run_filter function in net/core/filter.c in the Linux kernel through 3.14.3 do not check whether a certain length value is sufficiently large, which allows local users to cause a denial of service (integer underflow and system crash) via crafted BPF instructions. NOTE: the affected code was moved to the __skb_get_nlattr and __skb_get_nlattr_nest functions before the vulnerability was announced.
SourceCVE (at NVD; oss-sec, fulldisc, OSVDB, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SuSE, Mageia, more)
ReferencesDLA-0015-1, DSA-2949-1
NVD severitymedium (attack range: local)
Debian/oldstablepackage linux-2.6 is vulnerable.
Debian/stablenot vulnerable.
Debian/testingnot vulnerable.
Debian/unstablenot vulnerable.

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
linux (PTS)wheezy3.2.65-1fixed
wheezy (security)3.2.65-1+deb7u2fixed
sid, jessie3.16.7-ckt9-2fixed
linux-2.6 (PTS)squeeze (security), squeeze2.6.32-48squeeze6vulnerable
squeeze (lts)2.6.32-48squeeze11fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs


Upstream fix
Introduced by

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