CVE-2022-49342 net: ethernet: bgmac: Fix refcount leak in bcma_mdio_mii_register
A refcount leak in the Linux kernel's bgmac Ethernet driver can lead to resource exhaustion and denial of service.
- 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-2022-49342?
CVE-2022-49342 is a medium-severity memory corruption 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:
net: ethernet: bgmac: Fix refcount leak in bcma_mdio_mii_register
of_get_child_by_name() returns a node pointer with refcount incremented, we should use of_node_put() on it when not need anymore. Add missing of_node_put() to avoid refcount leak.
Which versions are affected by CVE-2022-49342?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2022-49342?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2022-49342 being exploited?
There is no known exploitation of CVE-2022-49342 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-58497, DEBIAN-CVE-2022-49342, GHSA-v3c9-qg4r-mvch, ROOT-OS-DEBIAN-11-CVE-2022-49342, ROOT-OS-UBUNTU-2204-CVE-2022-49342, UBUNTU-CVE-2022-49342.