drm/amd/display: Resize MST HDCP per-connector arrays to 32
CVE-2026-90289 · published 17 Sept 2026
How serious is it
- Severity: high, CVSS score 7.8 out of 10.
- No exploit prediction (EPSS) score yet.
- Not on the CISA list of exploited vulnerabilities.
- No public exploit in Exploit-DB.
Is your app affected by CVE-2026-90289?
Paste this prompt into Claude Code, Cursor or any AI coding tool: it runs a free Shippable scan of your project and fixes what it finds. Built with Lovable, Bolt or v0? Scan your live app. Or upload your package file.
Who is affected
- Linux Linux: 82986fd631fa04bcedaefe11a6b3767601cbe84f to < decea8279bec5a35413b2cb8e36951cca308fac0, 82986fd631fa04bcedaefe11a6b3767601cbe84f to < ac490fea9fe74f9d9975c5d8250c8719750589cd, 82986fd631fa04bcedaefe11a6b3767601cbe84f to < 562d24ac214ba9530d88841088eb6adce5c537b5, 82986fd631fa04bcedaefe11a6b3767601cbe84f to < 0fa116a17b69a28712cdf209318e345b676d7f6c
- Linux Linux: 6.3
How to check
- Find out whether you run the affected product and which version, then compare it with the versions above.
How to fix
Copies a prompt for Claude Code, Cursor or Codex that asks it to check whether you run this product.
- Apply the vendor's update or mitigation from the references below. If there is none yet, limit exposure of the affected service until there is.
- If a vulnerable version was live, check your logs and rotate the secrets that server could read.
The advisory
In the Linux kernel, the following vulnerability has been resolved:
drm/amd/display: Resize MST HDCP per-connector arrays to 32
AMDGPU_DM_MAX_DISPLAY_INDEX is 31. It suggest a maximum number of
32 connectors. But the way it's used is like MAX_DISPLAY_COUNT.
Hence we're off by one with DRM core, which supports a max of 32
connectors.
Rename AMDGPU_DM_MAX_DISPLAY_INDEX to AMDGPU_DM_MAX_DISPLAY_COUNT
to match its actual use, and increase the size to 32 to match the
originally intended size.
Check your whole app
Dependencies are only half of it. Free and read-only: before you push, run npx shippable-dev scan localhost:3000 in your project folder, no account needed. For your live app, you prove it's yours with a one-line tag first.
References
- git.kernel.org/stable/c/decea8279bec5a35413b2cb8e36951cca308fac0
- git.kernel.org/stable/c/ac490fea9fe74f9d9975c5d8250c8719750589cd
- git.kernel.org/stable/c/562d24ac214ba9530d88841088eb6adce5c537b5
- git.kernel.org/stable/c/0fa116a17b69a28712cdf209318e345b676d7f6c
- git.kernel.org/stable/c/261e0fe4e2c99f687114b64b10b98db964b475f4
Merged from CVE List. Last updated 26 Oct 2026. All vulnerabilities · RSS · JSON