CVE-2011-4326 Denial of service in n/a
Remote attackers can crash the Linux kernel by sending fragmented IPv6 UDP packets to a bridge device when UDP Fragmentation Offload is enabled.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2011-4326?
CVE-2011-4326 is a high-severity denial of service vulnerability in Linux kernel, published on 17 May 2012. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-399
Which versions are affected by CVE-2011-4326?
It affects 2 products.
Products include Avaya 96x1 Ip Deskphone Firmware, Linux kernel.
How do I fix CVE-2011-4326?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2011-4326 being exploited?
There is no known exploitation of CVE-2011-4326 in the wild and no public exploit code.
Sources
Also known as GHSA-c3pq-m2gr-f3r7.