# drm/xe/uapi: Reject coh_none PAT index for CPU cached memory in madvise

CVE record · `CVE-2026-46309`

- **Identifiers:** `CVE-2026-46309`
- **State:** Confirmed
- **Severity:** CVSS 7.0 High
- **Critical:** No
- **CNA:** Linux
- **Weakness (CWE):** [CWE-524](https://cwe.mitre.org/data/definitions/524.html)
- **Tags:** [CWE-524](https://agentprime.io/advisories/tag/cwe-524.md)
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 8 Jun 2026
- **Updated:** 15 Jul 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 8 Jun 2026, 15:50 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: `ada7486c5668db542a7d361268df931aca5b726a to before 87f9b1528e1ffc1da3615d552c9a06aba5e20b00` (git)
  - affected: `ada7486c5668db542a7d361268df931aca5b726a to before fea04cf6f2345bc50f15b6638906c35962b89424` (git)
  - affected: `ada7486c5668db542a7d361268df931aca5b726a to before 4e5591c2fc1b30f4ea5e2eab4c3a695acc404e39` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.18`
  - unaffected: `before 6.18` (semver)
  - unaffected: `6.18.32 to 6.18.*, inclusive` (semver)
  - unaffected: `7.0.9 to 7.0.*, inclusive` (semver)
  - unaffected: `7.1 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

- 7.0 High, CVSS 3.1: `CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H`, from ADP (redhat-SADP)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0013, the 2nd percentile, on 5 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 8 Jun 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-46309](https://www.cve.org/CVERecord?id=CVE-2026-46309)
- [NVD: CVE-2026-46309](https://nvd.nist.gov/vuln/detail/CVE-2026-46309)

### References from the CNA

- <https://git.kernel.org/stable/c/87f9b1528e1ffc1da3615d552c9a06aba5e20b00>
- <https://git.kernel.org/stable/c/fea04cf6f2345bc50f15b6638906c35962b89424>
- <https://git.kernel.org/stable/c/4e5591c2fc1b30f4ea5e2eab4c3a695acc404e39>

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-2026-46309>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-46309/>. Everything for agents: <https://agentprime.io/llms.txt>.