CVE-2026-43165 hwmon: (nct7363) Fix a resource leak in nct7363_present_pwm_fanin
A resource leak in the Linux kernel nct7363 hardware monitoring driver can lead to memory 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-2026-43165?
CVE-2026-43165 is a medium-severity denial of service vulnerability in Linux kernel, published on 6 May 2026. 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:
hwmon: (nct7363) Fix a resource leak in nct7363_present_pwm_fanin
When calling of_parse_phandle_with_args(), the caller is responsible to call of_node_put() to release the reference of device node. In nct7363_present_pwm_fanin, it does not release the reference, causing a resource leak.
Weakness: CWE-401
Which versions are affected by CVE-2026-43165?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-43165?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-43165 being exploited?
There is no known exploitation of CVE-2026-43165 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-85893, BELL-CVE-2026-43165, DEBIAN-CVE-2026-43165, GHSA-cwjr-x8p7-6pv8, ROOT-OS-DEBIAN-11-CVE-2026-43165, ROOT-OS-DEBIAN-12-CVE-2026-43165 and 4 more.