PT-2025-14327 · Linux+4 · Linux Kernel+4

Published 2025-02-18 · Updated 2026-05-26 · CVE-2025-21946

Positive Technologies (AI Summary)

CVSS v3.1

7.1

High

Base vector

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

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

Description The issue is related to an out-of-bounds error in the parse sec desc() function within the ksmbd component of the Linux kernel. This occurs when osidoffset, gsidoffset, and dacloffset are greater than the smb ntsd struct size, potentially leading to a slab-out-of-bounds condition. The validation of sid also requires checking its inclusion in the subauth array size.

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

Exploit

Buffer Overflow

Out of bounds Read

Weakness Enumeration

CWE-119

CWE-125

Related Identifiers

BDU:2025-04651

CVE-2025-21946

ECHO-DE49-90A7-564C

OESA-2025-1446

OESA-2025-1450

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

Ubuntu

References · 457

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21946.json · Exploit
• https://ubuntu.com/security/CVE-2025-22072 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2024-58076 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-21946 · Security Note
• https://ubuntu.com/security/CVE-2025-22025 · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2025-20530.html · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2024-56602 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2024-57911 · Security Note
• 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://ubuntu.com/security/CVE-2025-22079 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-22073 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-22023 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2024-57912 · Security Note