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Fencer Intel
medium 4.7

CVE-2013-4163 json

The ip6_append_data_mtu function in net/ipv6/ip6_output.c in the IPv6 implementation in the Linux kernel through 3.10.3 does not properly m…

published 13y ago modified 4mo ago also EUVD-2013-4088

cvss
4.7
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 44%
public exploits
0
none known

Summary

The ip6_append_data_mtu function in net/ipv6/ip6_output.c in the IPv6 implementation in the Linux kernel through 3.10.3 does not properly maintain information about whether the IPV6_MTU setsockopt option had been specified, which allows local users to cause a denial of service (BUG and system crash) via a crafted application that uses the UDP_CORK option in a setsockopt system call.

Patch / fix

  • linux Debian 14, Debian 13, Debian 12 3.10.5-1

debian advisories DEBIAN-CVE-2013-4163

  • kernel-rt enterprise mrg 2 3.6.11.5-rt37.55.el6rt
  • mrg-rt-release enterprise mrg 2 3.6.11.5-rt37.55.el6rt
  • kernel-rt-trace enterprise mrg 2 3.6.11.5-rt37.55.el6rt
  • kernel-rt-vanilla enterprise mrg 2 3.6.11.5-rt37.55.el6rt
  • kernel-rt-firmware enterprise mrg 2 3.6.11.5-rt37.55.el6rt
  • kernel-rt-debuginfo-common-x86_64 enterprise mrg 2 3.6.11.5-rt37.55.el6rt

red hat advisories RHSA-2013:1264

Is CVE-2013-4163 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-2013-4163 updated cvss 4.9

Kernel: net: panic while appending data to a corked IPv6 socket in ip6_append_data_mtu

  • Red Hat MRG Realtime for RHEL 6 Server v.2 kernel-rt 3.6.11.5-rt37.55.el6rt, mrg-rt-release 3.6.11.5-rt37.55.el6rt, kernel-rt-trace 3.6.11.5-rt37.55.el6rt, kernel-rt-vanilla 3.6.11.5-rt37.55.el6rt, kernel-rt-firmware 3.6.11.5-rt37.55.el6rt, kernel-rt-debuginfo-common-x86_64 3.6.11.5-rt37.55.el6rt
    fixed: vendor fix RHSA-2013:1264
  • 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

0.52% chance of exploitation in the next 30 days, higher than 44% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • github.com https://github.com/torvalds/linux/commit/75a493e60ac4bbe2e977e7129d6d8cbb0dd236be 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-399 Resource Management Errors
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.