CVE-2022-49638 icmp: Fix data-races around sysctl.
Concurrent access to ICMP sysctl variables in the Linux kernel can cause data races, potentially leading to undefined behavior or system instability.
- 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-2022-49638?
CVE-2022-49638 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:
icmp: Fix data-races around sysctl.
While reading icmp sysctl variables, they can be changed concurrently. So, we need to add READ_ONCE() to avoid data-races.
Weakness: CWE-362
Which versions are affected by CVE-2022-49638?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2022-49638?
Apply the vendor's patch.
Is CVE-2022-49638 being exploited?
There is no known exploitation of CVE-2022-49638 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2022-49638, GHSA-vq8v-xvjg-8pvf, UBUNTU-CVE-2022-49638.