# drm/amd/display: validate plane degamma LUT size for private color prop

CVE record · `CVE-2026-89819`

- **Identifiers:** `CVE-2026-89819`
- **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: `980f8710075acaeb226a94cde6dda8ffad30123c to before f6f04d8ae5725bcc893bdc62e3467efd97255c5b` (git)
  - affected: `980f8710075acaeb226a94cde6dda8ffad30123c to before 0b2615b8b54f58bbdf986dffb38cbc35214a5cc5` (git)
  - affected: `980f8710075acaeb226a94cde6dda8ffad30123c to before b10cc09b329245c6d95f8fa3e7f068575e3e0e9f` (git)
  - affected: `980f8710075acaeb226a94cde6dda8ffad30123c to before e4c3ab59021e7c146a84b6671f0d530972bd58b4` (git)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.8`
  - unaffected: `before 6.8` (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-2026-89819](https://www.cve.org/CVERecord?id=CVE-2026-89819)
- [NVD: CVE-2026-89819](https://nvd.nist.gov/vuln/detail/CVE-2026-89819)

### References from the CNA

- <https://git.kernel.org/stable/c/f6f04d8ae5725bcc893bdc62e3467efd97255c5b>
- <https://git.kernel.org/stable/c/0b2615b8b54f58bbdf986dffb38cbc35214a5cc5>
- <https://git.kernel.org/stable/c/b10cc09b329245c6d95f8fa3e7f068575e3e0e9f>
- <https://git.kernel.org/stable/c/e4c3ab59021e7c146a84b6671f0d530972bd58b4>

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-2026-89819>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-89819/>. Everything for agents: <https://agentprime.io/llms.txt>.