CVE-2026-89590
Low risk· EPSS 6%Exploitation Probability (EPSS)
Low risk6th percentile - higher than 6% of all known CVEs
Summary
In the Linux kernel, the rocket_job_run() function in the accel/rocket driver has error path bugs. The fence reference held by job->done_fence is never released, and pm_runtime_get_sync() increments the usage counter even on failure, preventing the NPU from suspending. Additionally, an unsignaled fence is returned to the DRM scheduler, triggering a WARN.
Risk Assessment
The fence reference leak and runtime PM counter leak can permanently prevent the NPU from suspending and cause memory leaks. Kernel WARN messages may indicate system instability.
Recommendation
Update the Linux kernel to a version containing the fix that replaces pm_runtime_get_sync() with pm_runtime_resume_and_get() and properly releases fence references on error paths.
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Original NVD description (English source)
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 goto labels]
Vulnerability data from NVD (NIST) · CISA KEV · EPSS