PT-2025-8563 · Linux+3 · Linux Kernel+3

Kuniyuki Iwashima · Published 2022-01-01 · Updated 2026-03-14 · CVE-2022-49630

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 sysctl tcp ecn fallback in the Linux kernel. The value of sysctl tcp ecn fallback can be changed concurrently while it is being read, which requires the use of READ ONCE() to ensure a consistent view of its value.

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-2022-49630

RHSA-2023:2458

RHSA-2023_2458

Affected Products

Astra Linux

Debian

Linux Kernel

Red Hat

References · 17

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49630.json · Exploit
• https://osv.dev/vulnerability/CVE-2022-49630 · Vendor Advisory
• https://git.kernel.org/stable/c/1ec3d6c2626ee6e1b36b7bd006873a271406ba61 · Patch
• https://git.kernel.org/stable/c/12b8d9ca7e678abc48195294494f1815b555d658 · Patch
• https://ubuntu.com/security/CVE-2022-49630 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2022-49630 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2022-49630 · Vendor Advisory
• https://git.kernel.org/stable/c/8bcf7339f2cf70ea4461df6ea045d1aadfabfa11 · Patch
• https://osv.dev/vulnerability/ROOT-OS-DEBIAN-11-CVE-2022-49630 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2022-49630 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-49630 · Security Note
• https://cve.org/CVERecord?id=CVE-2022-49630 · Security Note
• https://lore.kernel.org/linux-cve-announce/2025022616-CVE-2022-49630-71c3@gregkh/T · Note
• https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git · Note
• https://twitter.com/CVEnew/status/1894867707780309477 · Twitter Post