# drm/nouveau/uvmm: fix premature region free on failed OP_UNMAP_SPARSE

CVE record · `CVE-2026-89801`

- **Identifiers:** `CVE-2026-89801`
- **State:** Confirmed
- **Severity:** CVSS 7.8 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 16 Sept 2026
- **Updated:** 19 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 16 Sept 2026, 10:30 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: `b88baab828713ce0b49b185444b2ee83bed373a8 to before ba42d8a1c2c7629c61914df11a7d63ac77449ffb` (git)
  - affected: `b88baab828713ce0b49b185444b2ee83bed373a8 to before 88114e3a96582882e63b2f73aa7a5a9cf0d5073c` (git)
  - affected: `b88baab828713ce0b49b185444b2ee83bed373a8 to before 24c25b182d17d1bdfde0088c96bdf6f93e8f46bc` (git)
  - affected: `b88baab828713ce0b49b185444b2ee83bed373a8 to before 4083d24c2636fde7b18076115af52820d203bc57` (git)
  - affected: `b88baab828713ce0b49b185444b2ee83bed373a8 to before ccf930812f23b8259ef64fd3394d53b093e4651a` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.6`
  - unaffected: `before 6.6` (semver)
  - unaffected: `6.6.157 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.110 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.51 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.5 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

- 7.8 High, CVSS 3.1: `CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`, from CNA (Linux)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0016, the 5th percentile, on 14 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 16 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-89801](https://www.cve.org/CVERecord?id=CVE-2026-89801)
- [NVD: CVE-2026-89801](https://nvd.nist.gov/vuln/detail/CVE-2026-89801)

### References from the CNA

- <https://git.kernel.org/stable/c/ba42d8a1c2c7629c61914df11a7d63ac77449ffb>
- <https://git.kernel.org/stable/c/88114e3a96582882e63b2f73aa7a5a9cf0d5073c>
- <https://git.kernel.org/stable/c/24c25b182d17d1bdfde0088c96bdf6f93e8f46bc>
- <https://git.kernel.org/stable/c/4083d24c2636fde7b18076115af52820d203bc57>
- <https://git.kernel.org/stable/c/ccf930812f23b8259ef64fd3394d53b093e4651a>

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-2026-89801>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-89801/>. Everything for agents: <https://agentprime.io/llms.txt>.