CVE-2026-93143 staging: media: ipu7: fix pm_runtime refcount leak in ipu7_resume()
A resource leak in the Linux kernel IPU7 driver allows local attackers to cause a denial of service by exhausting runtime PM references.
- 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-2026-93143?
CVE-2026-93143 is a denial of service vulnerability in Linux, published on 17 Sep 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:
staging: media: ipu7: fix pm_runtime refcount leak in ipu7_resume()
ipu7_resume() calls pm_runtime_get_sync() before resuming the device. If the runtime PM resume fails, the usage count remains incremented, but the error path returns without dropping the reference.
Use pm_runtime_resume_and_get() instead, which balances the usage count on failure and avoids the leak. Keep returning 0 on error, as resume callbacks should not propagate failures to the PM core, matching the behaviour of the ipu6 driver.
Which versions are affected by CVE-2026-93143?
How do I fix CVE-2026-93143?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-93143 being exploited?
There is no known exploitation of CVE-2026-93143 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-93143, DEBIAN-CVE-2026-93143, GHSA-f9hr-9g5j-m6mm, UBUNTU-CVE-2026-93143.