Skip to content
Fencer Intel
high 7.8

CVE-2012-2744 json

net/ipv6/netfilter/nf_conntrack_reasm.c in the Linux kernel before 2.6.34, when the nf_conntrack_ipv6 module is enabled, allows remote atta…

published 2012-08-09 14 y ago modified 2026-06-16 4 mo ago also EUVD-2012-2724

cvss
7.8
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.5%
EPSS 4.5% chance of exploitation in 30 days, percentile 91%
public exploits
0
none known

Summary

net/ipv6/netfilter/nf_conntrack_reasm.c in the Linux kernel before 2.6.34, when the nf_conntrack_ipv6 module is enabled, allows remote attackers to cause a denial of service (NULL pointer dereference and system crash) via certain types of fragmented IPv6 packets.

Patch / fix

  • linux Debian 14, Debian 13, Debian 12 2.6.34-1

debian advisories DEBIAN-CVE-2012-2744

  • kernel RHEL 6 2.6.32-279.1.1.el6
  • perf RHEL 6 2.6.32-279.1.1.el6
  • python-perf RHEL 6 2.6.32-279.1.1.el6
  • kernel-kdump RHEL 6 2.6.32-279.1.1.el6
  • kernel-firmware RHEL 6 2.6.32-279.1.1.el6
  • kernel-bootwrapper RHEL 6 2.6.32-279.1.1.el6
  • kernel-debuginfo-common-i686 RHEL 6 2.6.32-279.1.1.el6
  • kernel-debuginfo-common-ppc64 RHEL 6 2.6.32-279.1.1.el6

red hat advisories RHSA-2012:1064RHSA-2012:1148RHSA-2012:1129RHSA-2012:1114

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-2012-2744 updated cvss 7.8

kernel: netfilter: null pointer dereference in nf_ct_frag6_reasm()

  • Red Hat Enterprise Linux Desktop (v. 6) perf 2.6.32-279.1.1.el6, kernel 2.6.32-279.1.1.el6, kernel-firmware 2.6.32-279.1.1.el6, kernel-debuginfo-common-i686 2.6.32-279.1.1.el6, kernel-debuginfo-common-x86_64 2.6.32-279.1.1.el6 Red Hat Enterprise Linux Desktop Optional (v. 6) kernel 2.6.32-279.1.1.el6, python-perf 2.6.32-279.1.1.el6, kernel-debuginfo-common-i686 2.6.32-279.1.1.el6, kernel-debuginfo-common-x86_64 2.6.32-279.1.1.el6 Red Hat Enterprise Linux HPC Node (v. 6) perf 2.6.32-279.1.1.el6, kernel 2.6.32-279.1.1.el6, kernel-firmware 2.6.32-279.1.1.el6, kernel-debuginfo-common-x86_64 2.6.32-279.1.1.el6 Red Hat Enterprise Linux HPC Node Optional (v. 6) kernel 2.6.32-279.1.1.el6, python-perf 2.6.32-279.1.1.el6, kernel-debuginfo-common-x86_64 2.6.32-279.1.1.el6 Red Hat Enterprise Linux Server (v. 6) perf 2.6.32-279.1.1.el6, kernel 2.6.32-279.1.1.el6, kernel-kdump 2.6.32-279.1.1.el6, kernel-firmware 2.6.32-279.1.1.el6, kernel-bootwrapper 2.6.32-279.1.1.el6, kernel-debuginfo-common-i686 2.6.32-279.1.1.el6, +3 more
    fixed: vendor fix RHSA-2012:1064
  • Red Hat Enterprise Linux Server EUS (v. 6.0) perf 2.6.32-71.40.1.el6, kernel 2.6.32-71.40.1.el6, kernel-kdump 2.6.32-71.40.1.el6, kernel-firmware 2.6.32-71.40.1.el6, kernel-bootwrapper 2.6.32-71.40.1.el6, kernel-debuginfo-common-i686 2.6.32-71.40.1.el6, +3 more
    fixed: vendor fix RHSA-2012:1114
  • Red Hat Enterprise Linux Server EUS (v. 6.1) perf 2.6.32-131.30.1.el6, kernel 2.6.32-131.30.1.el6, kernel-kdump 2.6.32-131.30.1.el6, kernel-firmware 2.6.32-131.30.1.el6, kernel-bootwrapper 2.6.32-131.30.1.el6, kernel-debuginfo-common-i686 2.6.32-131.30.1.el6, +3 more
    fixed: vendor fix RHSA-2012:1148
  • Red Hat Enterprise Linux Server EUS (v. 6.2) perf 2.6.32-220.24.1.el6, kernel 2.6.32-220.24.1.el6, kernel-kdump 2.6.32-220.24.1.el6, kernel-firmware 2.6.32-220.24.1.el6, kernel-bootwrapper 2.6.32-220.24.1.el6, kernel-debuginfo-common-i686 2.6.32-220.24.1.el6, +3 more
    fixed: vendor fix RHSA-2012:1129
  • Red Hat Enterprise Linux Server Optional (v. 6) kernel 2.6.32-279.1.1.el6, python-perf 2.6.32-279.1.1.el6, kernel-debuginfo-common-i686 2.6.32-279.1.1.el6, kernel-debuginfo-common-ppc64 2.6.32-279.1.1.el6, kernel-debuginfo-common-s390x 2.6.32-279.1.1.el6, kernel-debuginfo-common-x86_64 2.6.32-279.1.1.el6
    fixed: vendor fix RHSA-2012:1064
  • Red Hat Enterprise Linux Server Optional EUS (v. 6.2) kernel 2.6.32-220.24.1.el6, python-perf 2.6.32-220.24.1.el6, kernel-debuginfo-common-i686 2.6.32-220.24.1.el6, kernel-debuginfo-common-ppc64 2.6.32-220.24.1.el6, kernel-debuginfo-common-s390x 2.6.32-220.24.1.el6, kernel-debuginfo-common-x86_64 2.6.32-220.24.1.el6
    fixed: vendor fix RHSA-2012:1129
  • Red Hat Enterprise Linux Workstation (v. 6) perf 2.6.32-279.1.1.el6, kernel 2.6.32-279.1.1.el6, kernel-firmware 2.6.32-279.1.1.el6, kernel-debuginfo-common-i686 2.6.32-279.1.1.el6, kernel-debuginfo-common-x86_64 2.6.32-279.1.1.el6 Red Hat Enterprise Linux Workstation Optional (v. 6) kernel 2.6.32-279.1.1.el6, python-perf 2.6.32-279.1.1.el6, kernel-debuginfo-common-i686 2.6.32-279.1.1.el6, kernel-debuginfo-common-x86_64 2.6.32-279.1.1.el6
    fixed: vendor fix RHSA-2012:1064
  • Red Hat Enterprise Linux 5 kernel Red Hat Enterprise MRG 2 kernel-rt, mrg-rt-release, kernel-rt-trace, kernel-rt-vanilla, kernel-rt-firmware
    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

4.47% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 7.8 AV:N/AC:L/Au:N/C:N/I:N/A:C

Classification

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.