CVE-2024-50288: media: vivid: fix buffer overwrite when using > 32 buffers
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 mustblank array that was still sized for 32 (VIDEOMAXFRAME). This caused an out-of-bounds write when using buffer indices >= 32.
Create a new define MAXVIDCAPBUFFERS that is used to access the mustblank array and set maxnumbuffers for the video capture queue.
This solves a crash reported by:
https://bugzilla.kernel.org/showbug.cgi?id=219258
Other sources
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— Launchpad
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
debian/linuxto a version that resolves this vulnerability.Fixed in 5.10.223-1Fixed in 5.10.234-1Fixed in 6.1.129-1Fixed in 6.1.135-1Fixed in 6.12.22-1Fixed in 6.12.25-1 - Upgrade
Upgrade
Linux kernel media: vividto a version that resolves this vulnerability.Patch media: vivid: fix buffer overwrite when using > 32 buffers - Configuration
For media/vivid, increase the maximum number of video capture queue buffers to 64 by introducing MAX_VID_CAP_BUFFERS used to access the must_blank array (previously sized for 32 / VIDEO_MAX_FRAME) and set max_num_buffers for the video capture queue accordingly.
media/vivid (video capture queue) MAX_VID_CAP_BUFFERS / must_blank sizing and buffer queue max_num_buffers = 64
Event History
Frequently Asked Questions
What is the severity of CVE-2024-50288?
CVE-2024-50288 has a medium severity level due to potential buffer overwrite issues.
How do I fix CVE-2024-50288?
To fix CVE-2024-50288, update your Linux kernel to version 6.12 or later.
What versions of the Linux kernel are affected by CVE-2024-50288?
CVE-2024-50288 affects Linux kernel versions between 6.8 and 6.11.8, as well as the 6.12 release candidates.
What components are impacted by CVE-2024-50288?
CVE-2024-50288 specifically impacts the video capture functionality in the Linux kernel's media subsystem.
Is there any workaround for CVE-2024-50288?
Currently, there are no recommended workarounds for CVE-2024-50288, so updating the kernel is the best mitigation.