PT-2025-8184 · Linux+3 · Linux Kernel+3

Syzbot · Published 2022-03-21 · Updated 2025-09-29 · CVE-2022-49256

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 issue has been identified in the Linux kernel, specifically in the watch queue functionality. The free watch() function fails to properly free the watch object, leading to a memory leak. This issue can be detected by tools like kmemleak, which reports unreferenced objects. The memory leak occurs when the keyctl watch key() function allocates memory using kzalloc() but fails to free it properly.

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

Exploit

Improper Resource Release

Memory Leak

Weakness Enumeration

CWE-404

CWE-401

Related Identifiers

ALSA-2025_16880

BDU:2026-04313

CVE-2022-49256

RHSA-2023:6583

RHSA-2023_6583

SUSE-SU-2025:1027-1

SUSE-SU-2025:1176-1

SUSE-SU-2025:1183-1

SUSE-SU-2025:1241-1

SUSE-SU-2025_1027-1

SUSE-SU-2025_1241-1

Affected Products

Astra Linux

Linux Kernel

Red Hat

Suse

References · 1337

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49256.json · Exploit
• https://cve.org/CVERecord?id=CVE-2022-49256 · Security Note
• https://git.kernel.org/stable/c/3d8dcf278b1ee1eff1e90be848fa2237db4c07a7 · Patch
• https://osv.dev/vulnerability/SUSE-SU-2025:1027-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-49256 · Security Note
• https://git.kernel.org/stable/c/9d92be1a09fbb3dd65600dbfe7eedb40e7228e4b · Patch
• https://git.kernel.org/stable/c/7e8c9b0df07a77f0d072603b8ced2677e30e1893 · Patch
• https://osv.dev/vulnerability/SUSE-SU-2025:1241-1 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2022-49256 · Vendor Advisory
• https://ubuntu.com/security/CVE-2022-49256 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-04313 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2022-49256 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:1176-1 · Vendor Advisory
• https://git.kernel.org/stable/c/31824613a42aacdcbeb325bf07a1c8247a11ebe2 · Patch
• https://git.kernel.org/stable/c/f69aecb49968e14196366bbe896eab0a904229f5 · Patch