PT-2025-14321 · Linux+4 · Linux Kernel+4

Published 2025-02-28 · Updated 2026-01-20 · CVE-2025-21940

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A NULL pointer dereference issue was found in the Linux kernel, specifically in the KFD queue. This issue was encountered through KFD IOCTL Fuzzing when calling the kfd queue acquire buffers function.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

ALT-PU-2025-5786

BDU:2025-04652

CVE-2025-21940

SUSE-SU-2025:02254-1

SUSE-SU-2025:02307-1

SUSE-SU-2025:02333-1

SUSE-SU-2025_02254-1

SUSE-SU-2025_02307-1

SUSE-SU-2025_02333-1

Affected Products

Alt Linux

Astra Linux

Linux Kernel

Red Os

Suse

References · 586

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21940.json · Exploit
• https://security-tracker.debian.org/tracker/CVE-2025-21940 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2025-21940 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:02307-1 · Vendor Advisory
• https://bdu.fstec.ru/vul/2025-04652 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2025:02254-1 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2025-21940 · Vendor Advisory
• https://git.kernel.org/stable/c/33eb8041c5d6c19d46e7bfd23a031844336afd80 · Patch
• https://cve.org/CVERecord?id=CVE-2025-21940 · Security Note
• https://osv.dev/vulnerability/BELL-CVE-2025-21940 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:02333-1 · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2025-20530.html · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-21940 · Vendor Advisory
• https://git.kernel.org/stable/c/c3cbeafb4e0001d9146df50b470885e02664f3c7 · Patch
• https://ubuntu.com/security/CVE-2025-21940 · Vendor Advisory