PT-2026-47364 · Linux · Linux
Published
2026-06-08
·
Updated
2026-06-08
·
CVE-2026-46292
None
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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().
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Related Identifiers
Affected Products
Linux