CVE-2026-74604 Revert "thermal/drivers/hwmon: Cleanup coding style a bit"
A use-after-free in the Linux kernel thermal driver allows attackers to potentially execute code or escalate privileges via the error path.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-74604?
CVE-2026-74604 is a high-severity use after free vulnerability in Linux, published on 22 Aug 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:
Revert "thermal/drivers/hwmon: Cleanup coding style a bit"
Revert commit 030a48b0f6ce ("thermal/drivers/hwmon: Cleanup coding style a bit") that introduced a use-after-free into the error path of thermal_add_hwmon_sysfs() by removing a valid check from it.
Which versions are affected by CVE-2026-74604?
How do I fix CVE-2026-74604?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-74604 being exploited?
There is no known exploitation of CVE-2026-74604 in the wild and no public exploit code.
Sources
Also known as AZL-97299, BELL-CVE-2026-74604, DEBIAN-CVE-2026-74604, GHSA-qhg8-3wmw-3xjv, UBUNTU-CVE-2026-74604.