CVE-2026-89590

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

accel/rocket: Fix error path handling in rocket_job_run()

In rocket_job_run(), after taking an extra fence reference for

job->done_fence via dma_fence_get(), the error paths have three bugs:

- The dma_fence reference held by job->done_fence is never released,

causing a reference leak.

- pm_runtime_get_sync() increments the usage counter even on failure,

but the error path does not decrement it, leaking the runtime PM

reference and preventing the NPU from suspending.

- A valid but unsignaled fence is returned to the DRM scheduler,

which triggers WARN("Fence ... released with pending signals!")

when the scheduler drops its reference.

Fix by replacing pm_runtime_get_sync() with pm_runtime_resume_and_get()

which auto-balances the usage counter on failure, releasing both fence

references on error, and returning ERR_PTR(ret) instead of the

unsignaled fence.

[tomeu: Refactored error paths to use consolidated go

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References