Bug 2327181 (CVE-2024-50288)

Summary: CVE-2024-50288 kernel: media: vivid: fix buffer overwrite when using > 32 buffers
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
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Hardware: All   
OS: Linux   
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Bug Depends On: 2327239    
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Description OSIDB Bzimport 2024-11-19 02:02:14 UTC 
In the Linux kernel, the following vulnerability has been resolved:

media: vivid: fix buffer overwrite when using > 32 buffers

The maximum number of buffers that can be requested was increased to
64 for the video capture queue. But video capture used a must_blank
array that was still sized for 32 (VIDEO_MAX_FRAME). This caused an
out-of-bounds write when using buffer indices >= 32.

Create a new define MAX_VID_CAP_BUFFERS that is used to access the
must_blank array and set max_num_buffers for the video capture queue.

This solves a crash reported by:

	https://bugzilla.kernel.org/show_bug.cgi?id=219258
Comment 1 Avinash Hanwate 2024-11-19 05:27:44 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024111950-CVE-2024-50288-1c5d@gregkh/T