#VU91523 Improper locking in Linux kernel - CVE-2022-48633

Vulnerability identifier: #VU91523

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-2022-48633

CWE-ID: CWE-667

Exploitation vector: Local

Exploit availability: No

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

Vendor: Linux Foundation

Description

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

The vulnerability exists due to improper locking within the psb_gem_free_object() function in drivers/gpu/drm/gma500/gem.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 5.19, 5.19 rc1, 5.19 rc4, 5.19 rc5, 5.19 rc6, 5.19.1, 5.19.2, 5.19.3, 5.19.4, 5.19.5, 5.19.6, 5.19.7, 5.19.8, 5.19.9, 5.19.10, 5.19.11, 6.0 rc1, 6.0 rc2, 6.0 rc3, 6.0 rc4

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External links
https://git.kernel.org/stable/c/55c077d97fa67e9f19952bb24122a8316b089474
https://git.kernel.org/stable/c/b6f25c3b94f2aadbf5cbef954db4073614943d74
https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.19.12
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.0

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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.