Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: media: v4l2-core: explicitly clear ioctl input data As seen from a recent syzbot bug report, mistakes in the compat ioctl implementation can lead to uninitialized kernel stack data getting used as input for driver ioctl handlers. The reported bug is now fixed, but it's possible that other related bugs are still present or get added in the future. As the drivers need to check user input already, the possible impact is fairly low, but it might still cause an information leak. To be on the safe side, always clear the entire ioctl buffer before calling the conversion handler functions that are meant to initialize them.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | < 5.12.18 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/7b53cca764f9b291b7907fcd39d9e66ad728ee0bPatch
- https://git.kernel.org/stable/c/bfb48b54db25c3b4ef4bef5e0691464ebc4aa335Patch
- https://git.kernel.org/stable/c/dc02c0b2bd6096f2f3ce63e1fc317aeda05f74d8Patch
- https://git.kernel.org/stable/c/7b53cca764f9b291b7907fcd39d9e66ad728ee0bPatch
- https://git.kernel.org/stable/c/bfb48b54db25c3b4ef4bef5e0691464ebc4aa335Patch
- https://git.kernel.org/stable/c/dc02c0b2bd6096f2f3ce63e1fc317aeda05f74d8Patch
FAQ
What is CVE-2021-47339?
CVE-2021-47339 is a vulnerability with a CVSS score of 5.5 (MEDIUM). In the Linux kernel, the following vulnerability has been resolved: media: v4l2-core: explicitly clear ioctl input data As seen from a recent syzbot bug report, mistakes in the compat ioctl implemen...
How severe is CVE-2021-47339?
CVE-2021-47339 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-47339?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.