# drm/vc4: Use managed KMS polling to fix UAF on unbind

CVE record · `CVE-2026-98309`

- **Identifiers:** `CVE-2026-98309`
- **State:** Confirmed
- **Severity:** No CVSS score
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 6 Oct 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 6 Oct 2026, 08:46 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

## Affected products, as the CNA wrote them

- Vendor: Linux. Product: Linux.
  - affected: `c8b75bca92cbf064b9fa125fc74a85994452e935 to before b6beee927e7f4e3142032ff91b2d0417cdddc0f6` (git)
  - affected: `c8b75bca92cbf064b9fa125fc74a85994452e935 to before cf0c4432bda37b02e7d430ff5017228ceb7caf0c` (git)
  - affected: `c8b75bca92cbf064b9fa125fc74a85994452e935 to before ee507691c18f9fee5d4751e295ab9a7ff31d59ae` (git)
  - affected: `c8b75bca92cbf064b9fa125fc74a85994452e935 to before 7f9780df677370a19b4ec9764f13b1b82073e0d9` (git)
  - affected: `c8b75bca92cbf064b9fa125fc74a85994452e935 to before 073a30d75f309812ed61af134f24ffef4107b13a` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `4.4`
  - unaffected: `before 4.4` (semver)
  - unaffected: `6.6.158 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.112 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.54 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.8 to 7.2.*, inclusive` (semver)
  - unaffected: `7.3 to *, inclusive` (original_commit_for_fix)
  - Other versions: affected

## Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

## Severity and exploitation

No source has published a CVSS score for this record yet.

- **CISA KEV:** Not listed.
- **EPSS:** 0.0018, the 7th percentile, on 10 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the CVE Program, published 6 Oct 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-98309](https://www.cve.org/CVERecord?id=CVE-2026-98309)
- [NVD: CVE-2026-98309](https://nvd.nist.gov/vuln/detail/CVE-2026-98309)

### References from the CNA

- <https://git.kernel.org/stable/c/b6beee927e7f4e3142032ff91b2d0417cdddc0f6>
- <https://git.kernel.org/stable/c/cf0c4432bda37b02e7d430ff5017228ceb7caf0c>
- <https://git.kernel.org/stable/c/ee507691c18f9fee5d4751e295ab9a7ff31d59ae>
- <https://git.kernel.org/stable/c/7f9780df677370a19b4ec9764f13b1b82073e0d9>
- <https://git.kernel.org/stable/c/073a30d75f309812ed61af134f24ffef4107b13a>

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.

## Check whether this affects you

This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. Compare the affected versions above with what you run.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), `get_advisory` returns this record and `search_advisories` finds related ones. Setup: <https://agentprime.io/mcp.md>
- As JSON: <https://api.agentprime.io/v1/advisories/CVE-2026-98309>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-98309/>. Everything for agents: <https://agentprime.io/llms.txt>.