CVE-2026-89590
Received
Received - Intake
Use-After-Free in Linux Kernel Rocket Accelerator
Vulnerability report for CVE-2026-89590, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-09-11
Last updated on: 2026-09-11
Assigner: kernel.org
Description
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 goto labels]
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| linux | linux_kernel | * |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-UNKNOWN |
