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CVE-2011-4326

7.1 · HIGH

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 denia…

Published May 17, 2012linuxCWE-399EPSS 3.18%

Overview

CVE-2011-4326 is a high-severity vulnerability affecting linux linux_kernel. It was published on May 17, 2012 and has a CVSS 2.0 base score of 7.1 (HIGH).

This vulnerability has a CVSS 2.0 base score of 7.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
linuxlinux_kernel>= 0, < 2.6.39Affected
avaya96x1_ip_deskphone_firmware6.0.0Affected

References

Refdownloads.avaya.com/css/P8/documents/100156038Refftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39Refgit.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=a9cf73ea7ff78f52662c8658d93c226effbbeddeRefwww.openwall.com/lists/oss-security/2011/11/21/10Refwww.securityfocus.com/bid/50751Refbugzilla.redhat.com/show_bug.cgi?id=682066Refbugzilla.redhat.com/show_bug.cgi?id=755584GitHubgithub.com/torvalds/linux/commit/a9cf73ea7ff78f52662c8658d93c226effbbeddeRefdownloads.avaya.com/css/P8/documents/100156038Refftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39

How CyberStrike helps

Frequently asked questions

What is CVE-2011-4326?

CVE-2011-4326 is a high-severity vulnerability affecting linux linux_kernel. It was published on May 17, 2012 and has a CVSS 2.0 base score of 7.1 (HIGH).

How severe is CVE-2011-4326?

This vulnerability has a CVSS 2.0 base score of 7.1, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2011-4326?

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2011-4326?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2011-4326 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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