Medium [CVE-2026-89773] Linux kernel: AMD display driver fails to configure HDCP in transition state
This medium-severity Red Hat Linux advisory covers CVE-2026-89773.
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Summary
A flaw was found in the `drm/amd/display` component of the Linux kernel. This vulnerability occurs because the High-bandwidth Digital Content Protection (HDCP) configuration routine is skipped during a transition state when an invalid `dm_stream_ctx` is present.
This can lead to the HDCP routine not being properly configured, potentially allowing unauthorized access to protected content. Red Hat severity: Moderate — CVSS 5.5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).
Weakness: CWE-908.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · medium-confidence parse· fetched 55 minutes ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · medium-confidence parse· fetched 55 minutes ago·verify at source
Mitigation
The source record does not include mitigation steps. That is not a statement that no fix exists — read the vendor advisory below for the authoritative guidance.
Official advisory · medium-confidence parse· fetched 55 minutes ago·verify at source
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