CVE-2025-21985 Information

Description

In the Linux kernel the following vulnerability has been resolved:

drm/amd/display: Fix out-of-bound accesses

[WHAT & HOW] hpo_stream_to_link_encoder_mapping has size MAX_HPO_DP2_ENCODERS(=4) but location can have size up to 6. As a result it is necessary to check location against MAX_HPO_DP2_ENCODERS.

Similiarly disp_cfg_stream_location can be used as an array index which should be 0..5 so the ASSERT’s conditions should be less without equal.

Reference

https://git.kernel.org/stable/c/36793d90d76f667d26c6dd025571481ee0c96abc https://git.kernel.org/stable/c/8adbb2a98b00926315fd513b5fe2596b5716b82d https://git.kernel.org/stable/c/9aedc776b11038f04f4641241bb7e877781e4aa4