PT-2025-8537 · Linux+2 · Linux Kernel+2

Kuniyuki Iwashima · Published 2023-05-09 · Updated 2026-03-27 · CVE-2022-49604

Positive Technologies (AI Summary)

CVSS v3.1

4.7

Medium

Base vector

AV:L/AC:H/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 data-race issue exists around the sysctl ip fwd use pmtu variable in the Linux kernel. This occurs because the variable can be changed concurrently while being read, which may lead to inconsistent behavior. To address this, the use of READ ONCE() is recommended for readers of sysctl ip fwd use pmtu.

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

Exploit

Race Condition

Weakness Enumeration

CWE-362

Related Identifiers

CVE-2022-49604

RHSA-2023:2458

RHSA-2023_2458

SUSE-SU-2026:0316-1

SUSE-SU-2026:0474-1

SUSE-SU-2026:0475-1

SUSE-SU-2026:0495-1

SUSE-SU-2026:0496-1

SUSE-SU-2026:0617-1

SUSE-SU-2026:1131-1

Affected Products

Astra Linux

Linux Kernel

Red Hat

References · 1007

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49604.json · Exploit
• https://osv.dev/vulnerability/SUSE-SU-2026:0496-1 · Vendor Advisory
• https://git.kernel.org/stable/c/eb15262128b793e4b1d1c4514d3e6d19c3959764 · Patch
• https://osv.dev/vulnerability/SUSE-SU-2026:0617-1 · Vendor Advisory
• https://git.kernel.org/stable/c/93fbc06da1d819f3981a7bd7928c3641ea67b364 · Patch
• https://osv.dev/vulnerability/CVE-2022-49604 · Vendor Advisory
• https://ubuntu.com/security/CVE-2022-49604 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:0475-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2022-49604 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2022-49604 · Vendor Advisory
• https://git.kernel.org/stable/c/7828309df0f89419a9349761a37c7d1b0da45697 · Patch
• https://osv.dev/vulnerability/SUSE-SU-2026:0495-1 · Vendor Advisory
• https://git.kernel.org/stable/c/b96ed5ccb09ae71103023ed13acefb194f609794 · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2022-49604 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:1131-1 · Vendor Advisory