CVE-2022-49601 tcp/dccp: Fix a data-race around sysctl_tcp_fwmark_accept.
A data race in the Linux kernel's TCP/DCCP sysctl handling 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-2022-49601?
CVE-2022-49601 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/dccp: Fix a data-race around sysctl_tcp_fwmark_accept.
While reading sysctl_tcp_fwmark_accept, it can be changed concurrently. Thus, we need to add READ_ONCE() to its reader.
Weakness: CWE-362
Which versions are affected by CVE-2022-49601?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2022-49601?
Apply the vendor's patch.
Is CVE-2022-49601 being exploited?
There is no known exploitation of CVE-2022-49601 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2022-49601, GHSA-x376-hhj5-hww2, UBUNTU-CVE-2022-49601.