CVE-2026-90289 PUBLISHED

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

Assigner: Linux
Reserved: 11.09.2026 Published: 17.09.2026 Updated: 17.09.2026

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.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from 82986fd631fa04bcedaefe11a6b3767601cbe84f to 0fa116a17b69a28712cdf209318e345b676d7f6c (excl.)
  • affected from 82986fd631fa04bcedaefe11a6b3767601cbe84f to 261e0fe4e2c99f687114b64b10b98db964b475f4 (excl.)
  • Version 99c444d3c3c43db354b253d9bfac081073dcb484 is affected
  • Version d90f97cb3821c47bdf773dcf6cade143773ec764 is affected
  • affected from 5.15.128 to 5.16 (excl.)
  • affected from 6.1.47 to 6.2 (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 6.3 is affected
  • unaffected from 0 to 6.3 (excl.)
  • unaffected from 7.2.6 to 7.2.* (incl.)
  • unaffected from 7.3-rc1 to * (incl.)

References