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CVE-2026-90289

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

HIGH
7.8
CVSS Score
Published: September 17, 2026 at 04:08 PM UTC
Updated: October 21, 2026 at 01:20 PM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
HIGH7.8
Exploit prediction
EPSS 0.2%

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
90%
5.15.1286.1.476.382986fd631fa04bcedaefe11a6b3767601cbe84f99c444d3c3c43db354b253d9bfac081073dcb484d90f97cb3821c47bdf773dcf6cade143773ec764
Vendor states this is fixed in 0fa116a17b69a28712cdf209318e345b676d7f6c (fixed)
Vendor states this is fixed in 261e0fe4e2c99f687114b64b10b98db964b475f4 (fixed)
Affected range stops below 5.16, so it looks safe — our inference, not a vendor statement
Vendor states this is fixed in 6.12.114 (unaffected)
Vendor states this is fixed in 6.18.57 (unaffected)
Affected range stops below 6.2, so it looks safe — our inference, not a vendor statement
Vendor states this is fixed in 6.3 (unaffected)
Vendor states this is fixed in 6.6.160 (unaffected)
Vendor states this is fixed in 7.2.6 (unaffected)
Vendor states this is fixed in 7.3 (unaffected)
Vendor states this is fixed in 7.3-rc1 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (5)

Source: cverecord
https://git.kernel.org/stable/c/0fa116a17b69a28712cdf209318e345b676d7f6c
Source: cverecord
https://git.kernel.org/stable/c/261e0fe4e2c99f687114b64b10b98db964b475f4
Source: cverecord
https://git.kernel.org/stable/c/562d24ac214ba9530d88841088eb6adce5c537b5
Source: cverecord
https://git.kernel.org/stable/c/decea8279bec5a35413b2cb8e36951cca308fac0
Source: cverecord
https://git.kernel.org/stable/c/ac490fea9fe74f9d9975c5d8250c8719750589cd

CVSS

7.8HIGHLinux
Vector?

Quick Info

StatusRECEIVED

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