CVE-2022-49591 net: dsa: microchip: ksz_common: Fix refcount leak bug
A refcount leak in the Microchip DSA driver can lead to memory exhaustion and denial of service in the Linux kernel.
- 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-2022-49591?
CVE-2022-49591 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: dsa: microchip: ksz_common: Fix refcount leak bug
In ksz_switch_register(), we should call of_node_put() for the reference returned by of_get_child_by_name() which has increased the refcount.
Which versions are affected by CVE-2022-49591?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2022-49591?
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-2022-49591 being exploited?
There is no known exploitation of CVE-2022-49591 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2022-49591, GHSA-f8vw-rqqx-m52j, ROOT-OS-DEBIAN-11-CVE-2022-49591, UBUNTU-CVE-2022-49591.