# drm/amd/display: Resize MST HDCP per-connector arrays to 32

CVE record · `CVE-2026-90289`

- **Identifiers:** `CVE-2026-90289`
- **State:** Confirmed
- **Severity:** CVSS 7.8 High
- **Critical:** No
- **CNA:** Linux
- **Technologies:** [Linux kernel](https://agentprime.io/advisories/technology/linux-kernel.md)
- **Published:** 17 Sept 2026
- **Updated:** 30 Oct 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: Linux) at 17 Sept 2026, 16:08 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: `d90f97cb3821c47bdf773dcf6cade143773ec764 to before 1c22294c7d9b3b1c26a18ca4eca8c863a5a0d907` (git)
  - affected: `82986fd631fa04bcedaefe11a6b3767601cbe84f to before decea8279bec5a35413b2cb8e36951cca308fac0` (git)
  - affected: `82986fd631fa04bcedaefe11a6b3767601cbe84f to before ac490fea9fe74f9d9975c5d8250c8719750589cd` (git)
  - affected: `82986fd631fa04bcedaefe11a6b3767601cbe84f to before 562d24ac214ba9530d88841088eb6adce5c537b5` (git)
  - affected: `82986fd631fa04bcedaefe11a6b3767601cbe84f to before 0fa116a17b69a28712cdf209318e345b676d7f6c` (git)
  - affected: `82986fd631fa04bcedaefe11a6b3767601cbe84f to before 261e0fe4e2c99f687114b64b10b98db964b475f4` (git)
  - affected: `99c444d3c3c43db354b253d9bfac081073dcb484` (git)
  - affected: `6.1.47 to before 6.1.191` (semver)
  - affected: `5.15.128 to before 5.16` (semver)
  - Other versions: unaffected
- Vendor: Linux. Product: Linux.
  - affected: `6.3`
  - unaffected: `before 6.3` (semver)
  - unaffected: `6.1.191 to 6.1.*, inclusive` (semver)
  - unaffected: `6.6.160 to 6.6.*, inclusive` (semver)
  - unaffected: `6.12.114 to 6.12.*, inclusive` (semver)
  - unaffected: `6.18.57 to 6.18.*, inclusive` (semver)
  - unaffected: `7.2.6 to 7.2.*, inclusive` (semver)
  - unaffected: `7.3 to *, inclusive` (original_commit_for_fix)
  - Other versions: affected

## Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

> The Linux kernel's amdgpu display driver, from version 6.3 onward, sizes its MST HDCP per-connector arrays one entry short of the 32 connectors the DRM core supports. The source gives few details on attacker access or impact; CVSS 3.1 rates it 7.8 (HIGH). Upgrade to 6.1.191, 6.6.160, 6.12.114, 6.18.57, or a later release in those series.

Written 12 Nov 2026.

## 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:** 0.0017, the 6th percentile, on 13 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 17 Sept 2026. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2026-90289](https://www.cve.org/CVERecord?id=CVE-2026-90289)
- [NVD: CVE-2026-90289](https://nvd.nist.gov/vuln/detail/CVE-2026-90289)

### References from the CNA

- <https://git.kernel.org/stable/c/1c22294c7d9b3b1c26a18ca4eca8c863a5a0d907>
- <https://git.kernel.org/stable/c/decea8279bec5a35413b2cb8e36951cca308fac0>
- <https://git.kernel.org/stable/c/ac490fea9fe74f9d9975c5d8250c8719750589cd>
- <https://git.kernel.org/stable/c/562d24ac214ba9530d88841088eb6adce5c537b5>
- <https://git.kernel.org/stable/c/0fa116a17b69a28712cdf209318e345b676d7f6c>
- <https://git.kernel.org/stable/c/261e0fe4e2c99f687114b64b10b98db964b475f4>

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-2026-90289>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2026-90289/>. Everything for agents: <https://agentprime.io/llms.txt>.