CVE-2011-4594

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2012-05-17 · updated 2026-06-16
Weakness: CWE-476

Description

The __sys_sendmsg function in net/socket.c in the Linux kernel before 3.1 allows local users to cause a denial of service (system crash) via crafted use of the sendmmsg system call, leading to an incorrect pointer dereference.

Affected products

Linux kernel: before 3.1 — fixed in 3.1

How to fix

Upgrade to a fixed version: Linux kernel 3.1. Check the vendor advisory for mitigations.

References

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=bc909d9ddbf7778371e36a651d6e4194b1cc7d4c
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.1
http://www.openwall.com/lists/oss-security/2011/12/08/4
https://bugzilla.redhat.com/show_bug.cgi?id=761646
https://github.com/torvalds/linux/commit/bc909d9ddbf7778371e36a651d6e4194b1cc7d4c
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=bc909d9ddbf7778371e36a651d6e4194b1cc7d4c
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.1
http://www.openwall.com/lists/oss-security/2011/12/08/4
https://bugzilla.redhat.com/show_bug.cgi?id=761646
https://github.com/torvalds/linux/commit/bc909d9ddbf7778371e36a651d6e4194b1cc7d4c

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