Public Date:
833402: CVE-2012-2744 kernel: netfilter: null pointer dereference in nf_ct_frag6_reasm()

The MITRE CVE dictionary describes this issue as:

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.

Find out more about CVE-2012-2744 from the MITRE CVE dictionary dictionary and NIST NVD.


This issue did not affect the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 5 as they did not include support for netfilter's ipv6 connection tracking module. This issue did not affect the versions of the Linux kernel as shipped with Red Hat Enterprise Linux MRG as they already contain the upstream commit that fixes this issue.

CVSS v2 metrics

Base Score 7.8
Base Metrics AV:N/AC:L/Au:N/C:N/I:N/A:C
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Complete

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Red Hat Security Errata

Platform Errata Release Date
Red Hat Enterprise Linux 6 (kernel) RHSA-2012:1064 2012-07-10
Red Hat Enterprise Linux Server EUS (v. 6.0) (kernel) RHSA-2012:1114 2012-07-24
Red Hat Enterprise Linux Server EUS (v. 6.1) (kernel) RHSA-2012:1148 2012-08-07
Red Hat Enterprise Linux Extended Update Support 6.2 (kernel) RHSA-2012:1129 2012-07-31

Affected Packages State

Platform Package State
Red Hat Enterprise MRG 2 realtime-kernel Not affected
Red Hat Enterprise Linux 5 kernel Not affected
Unless explicitly stated as not affected, all previous versions of packages in any minor update stream of a product listed here should be assumed vulnerable, although may not have been subject to full analysis.


Red Hat would like to thank Antonios Atlasis working with Beyond Security's SecuriTeam Secure Disclosure program for reporting this issue.
Last Modified

CVE description copyright © 2017, The MITRE Corporation