Bug 2393159 (CVE-2025-38680)

Summary: CVE-2025-38680 kernel: media: uvcvideo: Fix 1-byte out-of-bounds read in uvc_parse_format()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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OS: Linux   
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Description OSIDB Bzimport 2025-09-04 16:01:43 UTC 
In the Linux kernel, the following vulnerability has been resolved:

media: uvcvideo: Fix 1-byte out-of-bounds read in uvc_parse_format()

The buffer length check before calling uvc_parse_format() only ensured
that the buffer has at least 3 bytes (buflen > 2), buf the function
accesses buffer[3], requiring at least 4 bytes.

This can lead to an out-of-bounds read if the buffer has exactly 3 bytes.

Fix it by checking that the buffer has at least 4 bytes in
uvc_parse_format().
Comment 1 Jon Moroney 2025-09-04 20:03:54 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025090445-CVE-2025-38680-cce6@gregkh/T