PT-2025-8991 · Linux+2 · Linux Kernel+2

Published 2025-01-07 · Updated 2025-10-29 · CVE-2025-21800

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

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

Description A issue in the Linux kernel has been identified, specifically in the net/mlx5 component, where the HWS SET32 macro's bit offset being negative triggers a shift-out-of-bounds complaint from UBSAN. This occurs in the definer.c file.

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

Exploit

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

BDU:2025-11875

CVE-2025-21800

SUSE-SU-2025:01951-1

SUSE-SU-2025:01967-1

SUSE-SU-2025_01951-1

SUSE-SU-2025_01967-1

Affected Products

Astra Linux

Linux Kernel

Suse

References · 827

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21800.json · Exploit
• https://osv.dev/vulnerability/SUSE-SU-2025:01951-1 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2025-21800 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:01967-1 · Vendor Advisory
• https://git.kernel.org/stable/c/69c676c0ded472713e6d1b3a456b3c4f52f66f0e · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2025-21800 · Security Note
• https://cve.org/CVERecord?id=CVE-2025-21800 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2025-21800 · Vendor Advisory
• https://wiki.astralinux.ru/astra-linux-se18-bulletin-2025-0811SE18 · Vendor Advisory
• https://git.kernel.org/stable/c/92cff996624c4757d5bbace3dfa3f1567ba94143 · Patch
• https://git.kernel.org/stable/c/be482f1d10da781db9445d2753c1e3f1fd82babf · Patch
• https://osv.dev/vulnerability/BELL-CVE-2025-21800 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2025-21800 · Vendor Advisory
• https://bdu.fstec.ru/vul/2025-11875 · Security Note
• https://ubuntu.com/security/CVE-2025-21800 · Vendor Advisory