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Fencer Intel
medium 4.7

CVE-2013-6431 json

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…

published 12y ago modified 4mo ago also EUVD-2013-6241

cvss
4.7
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 38%
public exploits
0
none known

Summary

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.

Patch / fix

  • linux Debian 14, Debian 13, Debian 12 3.11.5-1

debian advisories DEBIAN-CVE-2013-6431

  • kernel-rt enterprise mrg 2 3.8.13-rt27.33.el6rt
  • kernel-rt-trace enterprise mrg 2 3.8.13-rt27.33.el6rt
  • kernel-rt-vanilla enterprise mrg 2 3.8.13-rt27.33.el6rt
  • kernel-rt-firmware enterprise mrg 2 3.8.13-rt27.33.el6rt
  • kernel-rt-debuginfo-common-x86_64 enterprise mrg 2 3.8.13-rt27.33.el6rt

red hat advisories RHSA-2014:0100

Is CVE-2013-6431 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2013-6431 updated cvss 4.4

kernel: net: fib: fib6_add: potential NULL pointer dereference

  • Red Hat MRG Realtime for RHEL 6 Server v.2 kernel-rt 3.8.13-rt27.33.el6rt, kernel-rt-trace 3.8.13-rt27.33.el6rt, kernel-rt-vanilla 3.8.13-rt27.33.el6rt, kernel-rt-firmware 3.8.13-rt27.33.el6rt, kernel-rt-debuginfo-common-x86_64 3.8.13-rt27.33.el6rt
    fixed: vendor fix RHSA-2014:0100
  • Red Hat Enterprise Linux 5 kernel Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, python-perf, kernel-kdump, kernel-tools, +3 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.44% chance of exploitation in the next 30 days, higher than 38% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • github.com https://github.com/torvalds/linux/commit/ae7b4e1f213aa659aedf9c6ecad0bf5f0476e1e2 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 4.7 AV:L/AC:M/Au:N/C:N/I:N/A:C

Classification

Weakness
  • CWE-264 Permissions, Privileges, and Access Controls
Technology feeds

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.