CVE-2011-4326

Public Exploit

Description

The udp6_ufo_fragment function in net/ipv6/udp.c in the Linux kernel before 2.6.39, when a certain UDP Fragmentation Offload (UFO) configuration is enabled, allows remote attackers to cause a denial of service (system crash) by sending fragmented IPv6 UDP packets to a bridge device.

Category

7.1
CVSS
Severity: High
CVSS 2.0 •
EPSS 1.50% Top 20%
Third-Party Advisory avaya.com Third-Party Advisory securityfocus.com Third-Party Advisory redhat.com Third-Party Advisory redhat.com Third-Party Advisory github.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://www.securityfocus.com/bid/50751 vdb entry third party advisory
http://downloads.avaya.com/css/P8/documents/100156038 third party advisory
http://www.openwall.com/lists/oss-security/2011/11/21/10 mailing list
https://github.com/torvalds/linux/commit/a9cf73ea7ff78f52662c8658d93c226effbbedde third party advisory patch
http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39 broken link
https://bugzilla.redhat.com/show_bug.cgi?id=682066 issue tracking exploit third party advisory
https://bugzilla.redhat.com/show_bug.cgi?id=755584 issue tracking third party advisory
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=a9cf73ea7ff78f52662c8658d93c226effbbedde

Frequently Asked Questions

What is the severity of CVE-2011-4326?
CVE-2011-4326 has been scored as a high severity vulnerability.
How to fix CVE-2011-4326?
To fix CVE-2011-4326, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2011-4326 being actively exploited in the wild?
It is possible that CVE-2011-4326 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.