# drm/nouveau/uvmm: fix UAF in nouveau_uvmm_sm when BO is in TTM_PL_SYSTEM

CVE record · `CVE-2026-98517`

- **Identifiers:** `CVE-2026-98517`
- **State:** Confirmed
- **Severity:** CVSS 7.8 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 18 Oct 2026
- **Updated:** 24 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 18 Oct 2026, 15:17 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 34d9dffaf0ff43ac395a7955b3f7b5d9d6154bf3` (git)
  - affected: `b88baab828713ce0b49b185444b2ee83bed373a8 to before 1245b4b43da67596be61600dbd746539c79495ac` (git)
  - affected: `b88baab828713ce0b49b185444b2ee83bed373a8 to before 0d29bf51f8dddcf8556bf76710d3dd3024a1a717` (git)
  - affected: `b88baab828713ce0b49b185444b2ee83bed373a8 to before 5b2fffbba290ed74f381911b9986570bc10feaa4` (git)
  - affected: `b88baab828713ce0b49b185444b2ee83bed373a8 to before 3359a372efb6d585c97019ee1b7f1874442bcebe` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.6`
  - unaffected: `before 6.6` (semver)
  - unaffected: `6.6.160 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.112 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.55 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.9 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 8 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 18 Oct 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-98517](https://www.cve.org/CVERecord?id=CVE-2026-98517)
- [NVD: CVE-2026-98517](https://nvd.nist.gov/vuln/detail/CVE-2026-98517)

### References from the CNA

- <https://git.kernel.org/stable/c/34d9dffaf0ff43ac395a7955b3f7b5d9d6154bf3>
- <https://git.kernel.org/stable/c/1245b4b43da67596be61600dbd746539c79495ac>
- <https://git.kernel.org/stable/c/0d29bf51f8dddcf8556bf76710d3dd3024a1a717>
- <https://git.kernel.org/stable/c/5b2fffbba290ed74f381911b9986570bc10feaa4>
- <https://git.kernel.org/stable/c/3359a372efb6d585c97019ee1b7f1874442bcebe>

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-2026-98517>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-98517/>. Everything for agents: <https://agentprime.io/llms.txt>.