#VU45052 NULL pointer dereference in Linux kernel - CVE-2011-1748

Vulnerability identifier: #VU45052

Vulnerability risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2011-1748

CWE-ID: CWE-476

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error. A remote attacker can trigger denial of service conditions via a crafted release operation.

Mitigation
Update to version 2.6.39.

Vulnerable software versions

Linux kernel: 2.6.0 - 2.6.38.8

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

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.