Use-after-free in Linux kernel - CVE-2026-64492

Vulnerability details

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to a use-after-free in the tmp006 driver trigger registration logic when unloading the module after registering the DRDY trigger. A local user can trigger module unload after the trigger has been registered to cause a denial of service.

The issue occurs because the driver has no .remove() callback, leaving a dangling entry in the global trigger list after the trigger memory is freed.

Affected software

How to mitigate CVE-2026-64492

External References

• https://git.kernel.org/stable/c/3c5eed894efd93d68d7f6a359a81ddef0e928774
• https://git.kernel.org/stable/c/a4f8491da9563ba6eb77969ac26fc7052114c476
• https://git.kernel.org/stable/c/d90f868f56a16e10eedc6552f48d99dff4d275b7

Related Security Bulletins

• Use-after-free in Linux kernel iio temperature driver