CVE-2011-4326

7.1 HIGH 3% exploit odds Fix listed

What it is

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.

At a glance

Exploitability: Can be exploited over the network without logging in. High risk of service disruption.
Exploit odds: 3.2% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2012-05-17 11:00 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-16 23:34 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 3.2% in the next 30 days (EPSS).
Severity: 7.1 HIGH (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2012-05-17 11:00 UTC
Last modified: 2026-06-16 23:34 UTC
Exploit probability: 3.2% · EPSS, next 30 days
Weakness: CWE-399
Record status: Modified

Affected

Linux Kernel < 2.6.39
Avaya 96x1 Ip Deskphone Firmware ≤ 6.6.0

Attack profile CVSS 2.0 · 7.1

Attack vector: Network
Complexity: Medium
Authentication: None
Confidentiality: None
Integrity: None
Availability: Complete

Raw vector

AV:N/AC:M/Au:N/C:N/I:N/A:C

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2011-4326.md and follow it. Check whether this project is affected by CVE-2011-4326. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record