PT-2025-14325 · Linux+5 · Linux Kernel+5

Published 2025-02-27 · Updated 2026-05-26 · CVE-2025-21944

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 bug in the Linux kernel's ksmbd component has been resolved. The issue occurs when the lock count is greater than 1, causing flags to potentially hold an old value. This should be checked with the flags of smb lock, not flags. The bug can lead to a trap in the locks free lock error handling routine.

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

Exploit

DoS

Improper Locking

Weakness Enumeration

CWE-667

Related Identifiers

BDU:2025-04650

CVE-2025-21944

DLA-4193-1

DSA-5900-1

ECHO-8FD3-4516-7D57

OESA-2025-1729

OESA-2025-1730

USN-7605-1

USN-7605-2

USN-7606-1

USN-7628-1

USN-7764-1

USN-7764-2

USN-7765-1

USN-7766-1

USN-7767-1

USN-7767-2

USN-7779-1

USN-7790-1

USN-7800-1

USN-7801-1

USN-7801-2

USN-7801-3

USN-7802-1

USN-7809-1

Affected Products

Astra Linux

Debian

Linuxmint

Linux Kernel

Red Os

Ubuntu

References · 315

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21944.json · Exploit
• https://ubuntu.com/security/CVE-2025-22009 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-22083 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-22072 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-22025 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-53034 · Vendor Advisory
• https://osv.dev/vulnerability/USN-7802-1 · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2025-20530.html · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-22022 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-22064 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-21899 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-21902 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-39735 · Security Note
• https://ubuntu.com/security/CVE-2025-22079 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-22073 · Vendor Advisory