#VU91668 Integer underflow in Linux kernel - CVE-2023-52671

Vulnerability identifier: #VU91668

Vulnerability risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-52671

CWE-ID: CWE-191

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 execute arbitrary code.

The vulnerability exists due to integer underflow within the optc32_disable_crtc() function in drivers/gpu/drm/amd/display/dc/dcn32/dcn32_optc.c. A local user can execute arbitrary code.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

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External links
https://git.kernel.org/stable/c/ae62f1dde66a6f0eee98defc4c7a346bd5acd239
https://git.kernel.org/stable/c/4b6b479b2da6badff099b2e3abf0248936eefbf5
https://git.kernel.org/stable/c/e7b2b108cdeab76a7e7324459e50b0c1214c0386

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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.