Bug 2378989 (CVE-2025-38254)

Summary: CVE-2025-38254 kernel: drm/amd/display: Add sanity checks for drm_edid_raw()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedKeywords: Security
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OS: Linux   
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Description OSIDB Bzimport 2025-07-09 11:02:06 UTC 
In the Linux kernel, the following vulnerability has been resolved:

drm/amd/display: Add sanity checks for drm_edid_raw()

When EDID is retrieved via drm_edid_raw(), it doesn't guarantee to
return proper EDID bytes the caller wants: it may be either NULL (that
leads to an Oops) or with too long bytes over the fixed size raw_edid
array (that may lead to memory corruption).  The latter was reported
actually when connected with a bad adapter.

Add sanity checks for drm_edid_raw() to address the above corner
cases, and return EDID_BAD_INPUT accordingly.

(cherry picked from commit 648d3f4d209725d51900d6a3ed46b7b600140cdf)
Comment 1 Jon Moroney 2025-07-09 17:42:01 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025070935-CVE-2025-38254-7416@gregkh/T