#VU103030 NULL pointer dereference in Linux kernel - CVE-2025-21644

Vulnerability identifier: #VU103030

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-2025-21644

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 xe_gt_tlb_fence_timeout() function in drivers/gpu/drm/xe/xe_gt_tlb_invalidation.c, within the xe_gt_init_early() and xe_gt_init() functions in drivers/gpu/drm/xe/xe_gt.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

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External links
https://git.kernel.org/stable/c/09b94ddc58c6640cbbc7775a61a5387b8be71488
https://git.kernel.org/stable/c/9ab4981552930a9c45682d62424ba610edc3992d

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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.