CVE-2026-46292 pmdomain: core: Fix detach procedure for virtual devices in genpd
A missing runtime PM disable call in the Linux kernel power domain core can lead to a NULL pointer dereference and system crash.
- 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-2026-46292?
CVE-2026-46292 is a medium-severity vulnerability in Linux kernel, published on 8 Jun 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:
pmdomain: core: Fix detach procedure for virtual devices in genpd
If a device is attached to a PM domain through genpd_dev_pm_attach_by_id(), genpd calls pm_runtime_enable() for the corresponding virtual device that it registers. While this avoids boilerplate code in drivers, there is no corresponding call to pm_runtime_disable() in genpd_dev_pm_detach().
This means these virtual devices are typically detached from its genpd, while runtime PM remains enabled for them, which is not how things are designed to work. In worst cases it may lead to critical errors, like a NULL pointer dereference bug in genpd_runtime_suspend(), which was recently reported. For another case, we may end up keeping an unnecessary vote for a performance state for the device.
To fix these problems, let's add this missing call to pm_runtime_disable() in genpd_dev_pm_detach().
Weakness: CWE-772
Which versions are affected by CVE-2026-46292?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-46292?
Apply the vendor's patch.
Is CVE-2026-46292 being exploited?
There is no known exploitation of CVE-2026-46292 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-89597, BELL-CVE-2026-46292, DEBIAN-CVE-2026-46292, GHSA-6pv2-qc8v-r267, ROOT-OS-DEBIAN-11-CVE-2026-46292, ROOT-OS-DEBIAN-12-CVE-2026-46292 and 1 more.