CVE-2013-6431

Severity: medium (CVSS 4.7 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2013-12-09 · updated 2026-06-17
Weakness: CWE-264

Description

The fib6_add function in net/ipv6/ip6_fib.c in the Linux kernel before 3.11.5 does not properly implement error-code encoding, which allows local users to cause a denial of service (NULL pointer dereference and system crash) by leveraging the CAP_NET_ADMIN capability for an IPv6 SIOCADDRT ioctl call.

Affected products

Linux kernel: through 3.11.4; 3.0-rc1, 3.0-rc2, 3.0-rc3, 3.0-rc4, 3.0-rc5, 3.0-rc6 (+262)

References

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=ae7b4e1f213aa659aedf9c6ecad0bf5f0476e1e2
http://lists.opensuse.org/opensuse-security-announce/2014-02/msg00002.html
http://rhn.redhat.com/errata/RHSA-2014-0100.html
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.11.5
http://www.openwall.com/lists/oss-security/2013/12/06/5
https://bugzilla.redhat.com/show_bug.cgi?id=1039054
https://github.com/torvalds/linux/commit/ae7b4e1f213aa659aedf9c6ecad0bf5f0476e1e2
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=ae7b4e1f213aa659aedf9c6ecad0bf5f0476e1e2
http://lists.opensuse.org/opensuse-security-announce/2014-02/msg00002.html
http://rhn.redhat.com/errata/RHSA-2014-0100.html
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.11.5
http://www.openwall.com/lists/oss-security/2013/12/06/5

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