#VU106704 NULL pointer dereference in Linux kernel - CVE-2025-21941

Vulnerability identifier: #VU106704

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-2025-21941

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

The vulnerability exists due to NULL pointer dereference within the resource_build_scaling_params() function in drivers/gpu/drm/amd/display/dc/core/dc_resource.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 6.12, 6.12.1, 6.12.2, 6.12.3, 6.12.4, 6.12.5, 6.12.6, 6.12.7, 6.12.8, 6.12.9, 6.12.10, 6.12.11, 6.12.12, 6.12.13, 6.12.14, 6.12.15, 6.12.16, 6.12.17, 6.12.18

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External links
https://git.kernel.org/stable/c/3748fad09d89e9a5290e1738fd6872a79f794743
https://git.kernel.org/stable/c/374c9faac5a763a05bc3f68ad9f73dab3c6aec90
https://git.kernel.org/stable/c/3b3c2be58d5275aa59d8b4810a59f173f2f5bac1
https://git.kernel.org/stable/c/c1e54752dc12e90305eb0475ca908f42f5b369ca
https://git.kernel.org/stable/c/e0345c3478f185ca840daac7f08a1fcd4ebec3e9
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12.19

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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.