PT-2025-33560 · Linux+4 · Linux Kernel+4

David Wang · Published 2025-06-21 · Updated 2026-03-23 · CVE-2025-38517

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 versions prior to 6.16.0-rc2

Description: The Linux kernel contained a flaw in the alloc tag top users() function within the lib/alloc tag component. This function attempted to acquire a semaphore lock (alloc tag cttype->mod lock) even when alloc tag cttype was not allocated, which could occur when memory profiling was disabled or initialization failed. This resulted in a crash due to attempting to acquire a non-existent semaphore, specifically a general protection fault. The issue became more easily triggered after commit 780138b12381.

Recommendations: Update to a version of the Linux kernel later than 6.16.0-rc2.

Exploit

Fix

NULL Pointer Dereference

Improper Initialization

Weakness Enumeration

CWE-476

CWE-665

Related Identifiers

BDU:2025-15163

CVE-2025-38517

USN-7879-1

USN-7879-2

USN-7879-3

USN-7879-4

USN-7880-1

USN-7934-1

Affected Products

Astra Linux

Linuxmint

Linux Kernel

Red Os

Ubuntu

References · 240

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38517.json · Exploit
• https://ubuntu.com/security/CVE-2025-38612 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-38515 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-38666 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-38664 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-38473 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-38526 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-38507 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-7879-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-38351 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-38585 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-38561 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-38491 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-38628 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-38619 · Vendor Advisory