#VU68416 Memory leak in X.org Server - CVE-2022-3551

Vulnerability identifier: #VU68416

Vulnerability risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-3551

CWE-ID: CWE-401

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
X.org Server
Server applications / Other server solutions

Vendor: X.org

Description
The vulnerability allows a local user to perform DoS attack on the target system.

The vulnerability exists due memory leak within the ProcXkbGetKbdByName() function in xkb/xkb.c. A local user can force the application to leak memory and perform denial of service attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

X.org Server: 21.0.99.1 - 21.1.4

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External links
https://vuldb.com/?id.211052
https://cgit.freedesktop.org/xorg/xserver/commit/?id=18f91b950e22c2a342a4fbc55e9ddf7534a707d2

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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.