CVE-2022-49199 RDMA/nldev: Prevent underflow in nldev_stat_set_counter_dynamic_doit()
An integer underflow in the Linux kernel RDMA subsystem allows attackers to cause a denial of service via negative index values.
- 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-2022-49199?
CVE-2022-49199 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:
RDMA/nldev: Prevent underflow in nldev_stat_set_counter_dynamic_doit()
This code checks "index" for an upper bound but it does not check for negatives. Change the type to unsigned to prevent underflows.
Weakness: CWE-191
Which versions are affected by CVE-2022-49199?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2022-49199?
Apply the vendor's patch.
Is CVE-2022-49199 being exploited?
There is no known exploitation of CVE-2022-49199 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2022-49199, GHSA-4gx4-w2xq-pwmj, UBUNTU-CVE-2022-49199.