PT-2025-18525 · Linux+1 · Linux Kernel+1

Published 2022-11-15 · Updated 2025-05-02 · CVE-2022-49808

Positive Technologies (AI Summary)

CVSS v2.0

6.8

Medium

Base vector

AV:L/AC:L/Au:S/C:C/I:C/A:C

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

Description A vulnerability in the Linux kernel has been resolved, related to the DSA (Distributed Switch Architecture) network driver. The issue was caused by a leak of tagger-owned storage when the switch driver was unbound. This problem arose from a change in the way the driver connected to individual switches within a tree, which led to the normal driver teardown code path not being replaced. To solve this issue, a function was added to perform the opposite of dsa switch setup tag protocol(), ensuring that tagger-owned storage is properly freed during driver teardown. The teardown sequence is designed to prevent use-after-free issues in tagging protocol operations.

Recommendations To resolve this issue, update the Linux kernel to a version that includes the fix for this vulnerability. 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:2026-03976

CVE-2022-49808

Affected Products

Astra Linux

Linux Kernel

References · 15

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49808.json · Exploit
• https://osv.dev/vulnerability/CVE-2022-49808 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2022-49808 · Vendor Advisory
• https://git.kernel.org/stable/c/5809fb03942dbac25144db5bebea84fa003ecaca · Patch
• https://security-tracker.debian.org/tracker/CVE-2022-49808 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-49808 · Security Note
• https://ubuntu.com/security/CVE-2022-49808 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2022-49808 · Security Note
• https://bdu.fstec.ru/vul/2026-03976 · Security Note
• https://git.kernel.org/stable/c/4e0c19fcb8b5323716140fa82b79aa9f60e60407 · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2022-49808 · Vendor Advisory
• https://kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.0.10 · Note
• https://git.kernel.org/linus/4e0c19fcb8b5323716140fa82b79aa9f60e60407 · Note
• https://twitter.com/CVEnew/status/1918014623954980887 · Twitter Post
• https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git · Note