CVE-2022-49630 tcp: Fix a data-race around sysctl_tcp_ecn_fallback.
A data race in the Linux kernel TCP ECN fallback sysctl could lead to undefined behavior, requiring a patch to ensure thread-safe reads.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2022-49630?
CVE-2022-49630 is a medium-severity vulnerability in Linux kernel, published on 26 Feb 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
tcp: Fix a data-race around sysctl_tcp_ecn_fallback.
While reading sysctl_tcp_ecn_fallback, it can be changed concurrently. Thus, we need to add READ_ONCE() to its reader.
Weakness: CWE-362
Which versions are affected by CVE-2022-49630?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2022-49630?
Apply the vendor's patch.
Is CVE-2022-49630 being exploited?
There is no known exploitation of CVE-2022-49630 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2022-49630, GHSA-76x2-j576-5g7r, ROOT-OS-DEBIAN-11-CVE-2022-49630, UBUNTU-CVE-2022-49630.