CVE-2026-46292
MediumCVSS 5.5Exploitation Probability (EPSS)
Low risk2th percentile - higher than 2% of all known CVEs
Summary
In the Linux kernel, a vulnerability in the PM Domain (genpd) subsystem was found. The missing pm_runtime_disable() call when detaching virtual devices leaves runtime PM enabled, potentially causing critical errors like NULL pointer dereference.
Risk Assessment
The organization risks system crashes (e.g., kernel panic) and unnecessary performance state votes for devices, leading to instability and increased power consumption.
Recommendation
Immediately update the Linux kernel to a version containing the fix (commit adding pm_runtime_disable() in genpd_dev_pm_detach()).
Original NVD description (English source)
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().