PT-2025-18538 · Linux+2 · Linux Kernel+2

Published 2022-11-11 · Updated 2025-11-10 · CVE-2022-49821

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 possible memory leak in the mISDN module has been resolved. The issue occurred after a commit where the device name is allocated dynamically, and the reference is given up using put device(), allowing the name to be freed when the reference count is 0. The entry is freed in mISDN dsp dev release(), and list del() is called, which needs to be initialized.

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

BDU:2026-03725

CVE-2022-49821

OESA-2025-1541

SUSE-SU-2025:01918-1

SUSE-SU-2025:01966-1

SUSE-SU-2025:01982-1

SUSE-SU-2025:01983-1

SUSE-SU-2025:01995-1

SUSE-SU-2025:02173-1

SUSE-SU-2025:02262-1

SUSE-SU-2025:2173-1

SUSE-SU-2025_01982-1

SUSE-SU-2025_01983-1

SUSE-SU-2025_02173-1

SUSE-SU-2025_02262-1

Affected Products

Astra Linux

Linux Kernel

Suse

References · 767

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49821.json · Exploit
• https://git.kernel.org/stable/c/7a05e3929668c8cfef495c69752a9e91fac4878f · Patch
• https://cve.org/CVERecord?id=CVE-2022-49821 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-37839 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2022-49846 · Security Note
• https://git.kernel.org/stable/c/d4b8394725079670be309f9a35ad88a8cbbaaefd · Patch
• https://git.kernel.org/stable/c/bbd53d05c4c892080ef3b617eff4f57903acecb9 · Patch
• https://ubuntu.com/security/CVE-2022-49821 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2022-49821 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-49832 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2023-53091 · Security Note
• https://git.kernel.org/stable/c/b119bedbefb7dd9ed8bf8cb9f1056504250d610e · Patch
• https://osv.dev/vulnerability/SUSE-SU-2025:01982-1 · Vendor Advisory
• https://git.kernel.org/stable/c/0f2c681900a01e3f23789bca26d88268c3d5b51d · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2024-57982 · Security Note