CVE-2022-49680 ARM: exynos: Fix refcount leak in exynos_map_pmu
A missing reference count decrement in the Linux kernel Exynos PMU driver can lead to a memory leak, potentially causing 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-2022-49680?
CVE-2022-49680 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:
ARM: exynos: Fix refcount leak in exynos_map_pmu
of_find_matching_node() 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. of_node_put() checks null pointer.
Which versions are affected by CVE-2022-49680?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2022-49680?
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-2022-49680 being exploited?
There is no known exploitation of CVE-2022-49680 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2022-49680, GHSA-7mvq-qmpp-j7m5, UBUNTU-CVE-2022-49680.