CVE-2012-6647 Null dereference in n/a

What is CVE-2012-6647?

CVE-2012-6647 is a medium-severity vulnerability in Linux kernel, published on 26 May 2014. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

The futex_wait_requeue_pi function in kernel/futex.c in the Linux kernel before 3.5.1 does not ensure that calls have two different futex addresses, which allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact via a crafted FUTEX_WAIT_REQUEUE_PI command.

Weakness: CWE-20

Which versions are affected by CVE-2012-6647?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2012-6647?

Upgrade to a fixed version.

Is CVE-2012-6647 being exploited?

There is no known exploitation of CVE-2012-6647 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-2012-6647, GHSA-mvmp-r53f-9r47.