CVE-2011-4131 Denial of service in n/a

What is CVE-2011-4131?

CVE-2011-4131 is a medium-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 NFSv4 implementation in the Linux kernel before 3.2.2 does not properly handle bitmap sizes in GETACL replies, which allows remote NFS servers to cause a denial of service (OOPS) by sending an excessive number of bitmap words.

Weakness: CWE-189

Which versions are affected by CVE-2011-4131?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2011-4131?

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-2011-4131 being exploited?

There is no known exploitation of CVE-2011-4131 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2011-4131, GHSA-497c-8qgw-xqvj.