PT-2025-25866 · Linux+4 · Linux Kernel+4

Published 2022-08-30 · Updated 2026-05-26 · CVE-2022-49940

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 null pointer dereference can occur when attempting to access the gsm->receive() function in gsmld receive buf(). This happens because the gsmld receive buf() function can be accessed without initializing the MUX, resulting in gsm->receive() not being set. To fix this, a sanity check has been added to avoid calling gsm->receive() when it is not initialized.

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

Exploit

DoS

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

BDU:2026-02032

CESA-2024_3138

CVE-2022-49940

OESA-2025-1821

RHSA-2024:2394

RHSA-2024:2621

RHSA-2024:3138

RHSA-2024_2394

RHSA-2024_3138

SUSE-SU-2025:02264-1

SUSE-SU-2025:02321-1

SUSE-SU-2025:02322-1

SUSE-SU-2025:02537-1

SUSE-SU-2025:2264-1

SUSE-SU-2025_02264-1

SUSE-SU-2025_02537-1

Affected Products

Astra Linux

Centos

Linux Kernel

Red Hat

Suse

References · 604

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49940.json · Exploit
• https://bdu.fstec.ru/vul/2026-02032 · Security Note
• https://osv.dev/vulnerability/ROOT-OS-UBUNTU-2204-CVE-2022-49940 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-38146 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2022-49940 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:02322-1 · Vendor Advisory
• https://git.kernel.org/stable/c/309aea4b6b813f6678c3a547cfd7fe3a76ffa976 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2025-37968 · Security Note
• https://git.kernel.org/stable/c/5a82cf64f8ad63caf6bf115642ce44ddbc64311e · Patch
• https://git.kernel.org/stable/c/5aa37f9510345a812c0998bcbbc4d88d1dcc4d8b · Patch
• https://osv.dev/vulnerability/SUSE-SU-2025:02321-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-38023 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-38072 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2022-49940 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2022-49940 · Vendor Advisory