Bug 2383396 (CVE-2025-38362)

Summary: CVE-2025-38362 kernel: drm/amd/display: Add null pointer check for get_first_active_display()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: medium    
Version: unspecifiedKeywords: Security
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OS: Linux   
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Description OSIDB Bzimport 2025-07-25 14:02:19 UTC 
In the Linux kernel, the following vulnerability has been resolved:

drm/amd/display: Add null pointer check for get_first_active_display()

The function mod_hdcp_hdcp1_enable_encryption() calls the function
get_first_active_display(), but does not check its return value.
The return value is a null pointer if the display list is empty.
This will lead to a null pointer dereference in
mod_hdcp_hdcp2_enable_encryption().

Add a null pointer check for get_first_active_display() and return
MOD_HDCP_STATUS_DISPLAY_NOT_FOUND if the function return null.
Comment 1 Jon Moroney 2025-07-25 19:29:23 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025072557-CVE-2025-38362-8922@gregkh/T