CVE-2026-46216: drm/xe/hdcp: Add NULL check for media_gt in intel_hdcp_gsc_check_status()

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-05-28 · updated 2026-06-17
Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: drm/xe/hdcp: Add NULL check for media_gt in intel_hdcp_gsc_check_status() When media GT is disabled via configfs, there is no allocation for media_gt, which is kept as NULL. In such scenario, intel_hdcp_gsc_check_status() results in a kernel pagefault error due to &gt->uc.gsc being evaluated as an invalid memory address. Fix that by introducing a NULL check on media_gt and bailing out early if so. While at it, also drop the NULL check for gsc, since it can't be NULL if media_gt is not NULL. v2: - Get address for gsc only after checking that gt is not NULL. (Shuicheng) - Drop the NULL check for gsc. (Shuicheng) v3: - Add "Fixes" and "Cc: <stable...>" tags. (Matt) (cherry picked from commit bfaf87e84ca3ca3f6e275f9ae56da47a8b55ffd1)

Affected products

Linux kernel: from 6.10 before 6.12.92; from 6.13 before 6.18.34; from 6.19 before 7.0.9; 7.1-rc1, 7.1-rc2 — fixed in 6.12.92, 6.18.34, 7.0.9

How to fix

Upgrade to a fixed version: Linux kernel 6.12.92, 6.18.34, 7.0.9. Check the vendor advisory for mitigations.

References

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