CVE-2011-1748

Severity: medium (CVSS 4.9 v2.0)
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: 2011-05-09 · updated 2026-06-16
Weakness: CWE-476

Description

The raw_release function in net/can/raw.c in the Linux kernel before 2.6.39-rc6 does not properly validate a socket data structure, which allows local users to cause a denial of service (NULL pointer dereference) or possibly have unspecified other impact via a crafted release operation.

Affected products

Linux kernel: before 2.6.39; 2.6.39, 2.6.39-rc1, 2.6.39-rc2, 2.6.39-rc3, 2.6.39-rc4, 2.6.39-rc5 — fixed in 2.6.39

How to fix

Upgrade to a fixed version: Linux kernel 2.6.39. Check the vendor advisory for mitigations.

References

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=10022a6c66e199d8f61d9044543f38785713cbbd
http://openwall.com/lists/oss-security/2011/04/20/7
http://openwall.com/lists/oss-security/2011/04/21/1
http://openwall.com/lists/oss-security/2011/04/21/2
http://openwall.com/lists/oss-security/2011/04/21/7
http://openwall.com/lists/oss-security/2011/04/22/2
http://openwall.com/lists/oss-security/2011/04/25/4
http://permalink.gmane.org/gmane.linux.network/192974
http://www.kernel.org/pub/linux/kernel/v2.6/testing/ChangeLog-2.6.39-rc6
http://www.securityfocus.com/bid/47835
https://bugzilla.redhat.com/show_bug.cgi?id=698057
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=10022a6c66e199d8f61d9044543f38785713cbbd

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