PT-2025-37979 · Linux+4 · Linux Kernel+4

Published 2025-08-26 · Updated 2026-03-13 · CVE-2025-39834

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 memory leak exists in the hws action get shared stc nic function within the net/mlx5 module of the Linux kernel. This occurs when an invalid stc type is provided, leading to memory allocation for shared stc without subsequent deallocation during an error flow. The fix involves ensuring proper cleanup by jumping to the free shared stc label.

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

Exploit

Missing Release of Resource after Effective Lifetime

Memory Leak

Weakness Enumeration

CWE-772

CWE-401

Related Identifiers

BDU:2026-06109

CVE-2025-39834

OPENSUSE-SU-2025:20081-1

SUSE-SU-2025:03601-1

SUSE-SU-2025:03633-1

SUSE-SU-2025:21074-1

SUSE-SU-2025:21139-1

SUSE-SU-2025:21179-1

SUSE-SU-2025:3725-1

Affected Products

Astra Linux

Debian

Linux Kernel

Suse

Mlx5

References · 1375

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/39xxx/CVE-2025-39834.json · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2025-39834 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2025:21139-1 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-OS-DEBIAN-13-CVE-2025-39834 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:03601-1 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2025-39834 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-39834 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:21074-1 · Vendor Advisory
• https://git.kernel.org/stable/c/051fd8576a2e4e95d5870c5c9f8679c5b16882e4 · Patch
• https://osv.dev/vulnerability/BELL-CVE-2025-39834 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2025-39834 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2025:3725-1 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-39834 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-06109 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2025:21179-1 · Vendor Advisory