Public Date:
1011927: CVE-2013-4387 Kernel: net: IPv6: panic when UFO=On for an interface

The MITRE CVE dictionary describes this issue as:

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.

Find out more about CVE-2013-4387 from the MITRE CVE dictionary dictionary and NIST NVD.


This issue does not affect the version of the kernel package as shipped with Red Hat Enterprise Linux 5. This issue affects the versions of Linux kernel as shipped with Red Hat Enterprise Linux 6 and Red Hat Enterprise MRG 2. Future kernel updates for Red Hat Enterprise Linux 6 and Red Hat Enterprise MRG 2 may address this issue.

CVSS v2 metrics

NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.

Base Score 6.1
Base Metrics AV:A/AC:L/Au:N/C:N/I:N/A:C
Access Vector Adjacent 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 version 6 (kernel) RHSA-2013:1645 2013-11-20
MRG Grid for RHEL 6 Server v.2 (kernel-rt) RHSA-2013:1490 2013-10-31
Red Hat Enterprise Linux Server EUS (v. 6.4) (kernel) RHSA-2014:0284 2014-03-11

Affected Packages State

Platform Package State
Red Hat Enterprise Linux 7 kernel Not affected
Red Hat Enterprise Linux 5 kernel Not affected