CVE-2022-50757
Buffer Management Error in Linux camss Media Streaming Causes Kernel Warning
Publication date: 2025-12-24
Last updated on: 2025-12-24
Assigner: kernel.org
Description
Description
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| linux | linux_kernel | * |
| linux | kernel | * |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-UNKNOWN |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability occurs in the Linux kernel's media subsystem, specifically in the camss driver. When starting video streaming, if the streaming cannot be started due to a failure such as a link validation error, the system fails to properly clean up and return the received buffers. This can lead to a kernel warning and improper handling of resources. The fix involves correcting the error handling path to ensure that received buffers are returned if streaming fails to start.
How can this vulnerability impact me? :
If this vulnerability is triggered, it can cause kernel warnings and potentially lead to resource leaks or instability in the media streaming functionality of the Linux kernel. This may affect applications relying on video streaming, causing them to malfunction or crash due to improper buffer management.
How can this vulnerability be detected on my network or system? Can you suggest some commands?
This vulnerability can be detected by monitoring the kernel logs for warnings related to video buffer streaming failures. Specifically, look for kernel warnings containing 'vb2_start_streaming' and messages indicating failure to start streaming, such as those involving 'media_pipeline_start()' failing with EPIPE. You can use the command 'dmesg | grep vb2_start_streaming' or 'journalctl -k | grep vb2_start_streaming' to find such warnings.
What immediate steps should I take to mitigate this vulnerability?
Immediate mitigation involves updating the Linux kernel to a version where the fix is applied, which corrects the error path in video_start_streaming() of the camss driver to properly clean up received buffers on failed streaming starts. Until then, monitoring for the kernel warnings and avoiding usage scenarios that trigger streaming start failures may reduce impact.