PT-2025-25931 · Linux+3 · Linux Kernel+3

Published 2022-08-22 · Updated 2025-11-14 · CVE-2022-50005

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A use-after-free bug has been identified in the Linux kernel, specifically in the nfc: pn533 module. This issue arises when the pn532 uart device is detaching, and the pn532 uart remove() function is called without deleting the cmd timeout timer, leading to potential use-after-free bugs. The bug occurs due to a race condition between two threads, where one thread frees the pn532 structure while another thread attempts to access it. To fix this issue, a patch has been added to call del timer sync() in pn532 uart remove(), preventing the use-after-free bugs. Additionally, the pn53x unregister nfc() function is well-synchronized, setting nfc dev->shutting down to true and preventing syscalls from restarting the cmd timeout timer.

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

Exploit

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

BDU:2026-02575

CVE-2022-50005

RHSA-2023:6583

RHSA-2023_6583

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

Linux Kernel

Red Hat

Suse

References · 595

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50005.json · Exploit
• https://git.kernel.org/stable/c/9c34c33893db7a80d0e4b55c23d3b65e29609cfb · Patch
• https://git.kernel.org/stable/c/f1e941dbf80a9b8bab0bffbc4cbe41cc7f4c6fb6 · Patch
• https://git.kernel.org/stable/c/2c71f5d55a86fd5969428abf525c1ae6b1c7b0f5 · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2022-50005 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:02537-1 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2022-50005 · Vendor Advisory
• https://git.kernel.org/stable/c/50403ee6daddf0d7a14e9d3b51a377c39a08ec8c · Patch
• https://osv.dev/vulnerability/SUSE-SU-2025:02264-1 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2022-50005 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2025:02321-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2022-50005 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2022-50005 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2022-50005 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-02575 · Security Note