PT-2025-8494 · Linux+4 · Linux Kernel+4

Published 2022-05-27 · Updated 2025-10-24 · CVE-2022-49561

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 vulnerability in the Linux kernel has been resolved, related to netfilter: conntrack. The issue occurs when the conntrack is clashing, and insertion can free skb-> nfct and set skb-> nfct to the already-confirmed entry. This problem was not previously detected due to the conntrack entry and extension space being freed after an rcu grace period, and the race requires events to be enabled to trigger.

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

Exploit

Improper Access Control

Information Disclosure

Incorrect Privilege Assignment

Weakness Enumeration

CWE-284

CWE-200

CWE-266

Related Identifiers

BDU:2026-03686

CESA-2022_7683

CVE-2022-49561

RHSA-2022:7683

RHSA-2022:8267

RHSA-2022_7683

RHSA-2022_8267

SUSE-SU-2025:01600-1

SUSE-SU-2025_01600-1

Affected Products

Astra Linux

Centos

Linux Kernel

Red Hat

Suse

References · 244

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49561.json · Exploit
• https://git.kernel.org/stable/c/b16bb373988da3ceb0308381634117e18b6ec60d · Patch
• https://git.kernel.org/stable/c/04f9e9104c969d8ce10a4a43634f641ed082092d · Patch
• https://osv.dev/vulnerability/SUSE-SU-2025:01600-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2022-49561 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-03686 · Security Note
• https://git.kernel.org/stable/c/e97222b785e70e8973281666d709baad6523d8af · Patch
• https://osv.dev/vulnerability/CVE-2022-49561 · Vendor Advisory
• https://git.kernel.org/stable/c/91a36ec160ec1a0c8f5352b772dffcbb0b6023e3 · Patch
• https://git.kernel.org/stable/c/01989d7eebb61c99bd4b88ebc8e261bd2f02caed · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2022-49561 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2022-49561 · Vendor Advisory
• https://git.kernel.org/stable/c/92a999d1963eed0df666284e20055136ceabd12f · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2022-49561 · Security Note
• https://cve.org/CVERecord?id=CVE-2022-49561 · Security Note