NULL pointer dereference in Linux kernel selinux ss

1) NULL pointer dereference

EUVDB-ID: #VU92909

Risk: Low

CVSSv3.1: 4.8 [AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-48740

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to NULL pointer dereference within the cond_list_destroy() and cond_read_list() functions in security/selinux/ss/conditional.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

External links

http://git.kernel.org/stable/c/f446089a268c8fc6908488e991d28a9b936293db
http://git.kernel.org/stable/c/70caa32e6d81f45f0702070c0e4dfe945e92fbd7
http://git.kernel.org/stable/c/7ed9cbf7ac0d4ed86b356e1b944304ae9ee450d4
http://git.kernel.org/stable/c/186edf7e368c40d06cf727a1ad14698ea67b74ad

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.