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Fencer Intel
medium 6.1

CVE-2013-4387 json

net/ipv6/ip6_output.c in the Linux kernel through 3.11.4 does not properly determine the need for UDP Fragmentation Offload (UFO) processin…

published 13y ago modified 4mo ago also EUVD-2013-4268

cvss
6.1
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.6%
EPSS 2.6% chance of exploitation in 30 days, percentile 85%
public exploits
0
none known

Summary

net/ipv6/ip6_output.c in the Linux kernel through 3.11.4 does not properly determine the need for UDP Fragmentation Offload (UFO) processing of small packets after the UFO queueing of a large packet, which allows remote attackers to cause a denial of service (memory corruption and system crash) or possibly have unspecified other impact via network traffic that triggers a large response packet.

Patch / fix

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

debian advisories DEBIAN-CVE-2013-4387

  • kernel RHEL 6 2.6.32-431.el6
  • perf RHEL 6 2.6.32-431.el6
  • python-perf RHEL 6 2.6.32-431.el6
  • kernel-kdump RHEL 6 2.6.32-431.el6
  • kernel-firmware RHEL 6 2.6.32-431.el6
  • kernel-bootwrapper RHEL 6 2.6.32-431.el6
  • kernel-abi-whitelists RHEL 6 2.6.32-431.el6
  • kernel-debuginfo-common-i686 RHEL 6 2.6.32-431.el6

red hat advisories RHSA-2014:0284RHSA-2013:1645RHSA-2013:1490

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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-2013-4387 updated cvss 6.1

Kernel: net: IPv6: panic when UFO=On for an interface

  • Red Hat Enterprise Linux Compute Node Optional EUS (v. 6.4) kernel 2.6.32-358.37.1.el6, python-perf 2.6.32-358.37.1.el6, kernel-debuginfo-common-x86_64 2.6.32-358.37.1.el6
    fixed: vendor fix RHSA-2014:0284
  • Red Hat Enterprise Linux Desktop (v. 6) perf 2.6.32-431.el6, kernel 2.6.32-431.el6, kernel-firmware 2.6.32-431.el6, kernel-abi-whitelists 2.6.32-431.el6, kernel-debuginfo-common-i686 2.6.32-431.el6, kernel-debuginfo-common-x86_64 2.6.32-431.el6 Red Hat Enterprise Linux Desktop Optional (v. 6) python-perf 2.6.32-431.el6, kernel-debuginfo-common-i686 2.6.32-431.el6, kernel-debuginfo-common-x86_64 2.6.32-431.el6
    fixed: vendor fix RHSA-2013:1645
  • Red Hat Enterprise Linux HPC Node EUS (v. 6.4) perf 2.6.32-358.37.1.el6, kernel 2.6.32-358.37.1.el6, kernel-firmware 2.6.32-358.37.1.el6, kernel-debuginfo-common-x86_64 2.6.32-358.37.1.el6
    fixed: vendor fix RHSA-2014:0284
  • Red Hat Enterprise Linux HPC Node Optional (v. 6) python-perf 2.6.32-431.el6, kernel-debuginfo-common-x86_64 2.6.32-431.el6 Red Hat Enterprise Linux Server (v. 6) perf 2.6.32-431.el6, kernel 2.6.32-431.el6, kernel-kdump 2.6.32-431.el6, kernel-firmware 2.6.32-431.el6, kernel-bootwrapper 2.6.32-431.el6, kernel-abi-whitelists 2.6.32-431.el6, +4 more
    fixed: vendor fix RHSA-2013:1645
  • Red Hat Enterprise Linux Server EUS (v. 6.4) perf 2.6.32-358.37.1.el6, kernel 2.6.32-358.37.1.el6, kernel-kdump 2.6.32-358.37.1.el6, kernel-firmware 2.6.32-358.37.1.el6, kernel-bootwrapper 2.6.32-358.37.1.el6, kernel-debuginfo-common-i686 2.6.32-358.37.1.el6, +3 more
    fixed: vendor fix RHSA-2014:0284
  • Red Hat Enterprise Linux Server Optional (v. 6) python-perf 2.6.32-431.el6, kernel-debuginfo-common-i686 2.6.32-431.el6, kernel-debuginfo-common-ppc64 2.6.32-431.el6, kernel-debuginfo-common-s390x 2.6.32-431.el6, kernel-debuginfo-common-x86_64 2.6.32-431.el6
    fixed: vendor fix RHSA-2013:1645
  • Red Hat Enterprise Linux Server Optional EUS (v. 6.4) kernel 2.6.32-358.37.1.el6, python-perf 2.6.32-358.37.1.el6, kernel-debuginfo-common-i686 2.6.32-358.37.1.el6, kernel-debuginfo-common-ppc64 2.6.32-358.37.1.el6, kernel-debuginfo-common-s390x 2.6.32-358.37.1.el6, kernel-debuginfo-common-x86_64 2.6.32-358.37.1.el6
    fixed: vendor fix RHSA-2014:0284
  • Red Hat Enterprise Linux Workstation (v. 6) perf 2.6.32-431.el6, kernel 2.6.32-431.el6, kernel-firmware 2.6.32-431.el6, kernel-abi-whitelists 2.6.32-431.el6, kernel-debuginfo-common-i686 2.6.32-431.el6, kernel-debuginfo-common-x86_64 2.6.32-431.el6 Red Hat Enterprise Linux Workstation Optional (v. 6) python-perf 2.6.32-431.el6, kernel-debuginfo-common-i686 2.6.32-431.el6, kernel-debuginfo-common-x86_64 2.6.32-431.el6
    fixed: vendor fix RHSA-2013:1645
show 2 more
  • Red Hat MRG Realtime for RHEL 6 Server v.2 kernel-rt 3.8.13-rt14.25.el6rt, mrg-rt-release 3.8.13-rt14.25.el6rt, kernel-rt-trace 3.8.13-rt14.25.el6rt, kernel-rt-vanilla 3.8.13-rt14.25.el6rt, kernel-rt-firmware 3.8.13-rt14.25.el6rt, kernel-rt-debuginfo-common-x86_64 3.8.13-rt14.25.el6rt
    fixed: vendor fix RHSA-2013:1490
  • Red Hat Enterprise Linux 5 kernel Red Hat Enterprise Linux 7 perf, kernel, bpftool, python-perf, kernel-kdump, kernel-tools, +3 more Red Hat Enterprise Linux HPC Node EUS (v. 6.4) kernel-headers 2.6.32-358.37.1.el6 Red Hat Enterprise Linux Server EUS (v. 6.4) kernel-headers 2.6.32-358.37.1.el6
    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

2.58% chance of exploitation in the next 30 days, higher than 85% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • github.com https://github.com/torvalds/linux/commit/2811ebac2521ceac84f2bdae402455baa6a7fb47 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 6.1 AV:A/AC:L/Au:N/C:N/I:N/A:C

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
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.