Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: block: disable the elevator int del_gendisk The elevator is only used for file system requests, which are stopped in del_gendisk. Move disabling the elevator and freeing the scheduler tags to the end of del_gendisk instead of doing that work in disk_release and blk_cleanup_queue to avoid a use after free on q->tag_set from disk_release as the tag_set might not be alive at that point. Move the blk_qos_exit call as well, as it just depends on the elevator exit and would be the only reason to keep the not exactly cheap queue freeze in disk_release.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.16, < 5.18.8 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/50e34d78815e474d410f342fbe783b18192ca518Patch
- https://git.kernel.org/stable/c/f28699fafc047ec33299da01e928c3a0073c5cc6Patch
FAQ
What is CVE-2022-49694?
CVE-2022-49694 is a vulnerability with a CVSS score of 7.8 (HIGH). In the Linux kernel, the following vulnerability has been resolved: block: disable the elevator int del_gendisk The elevator is only used for file system requests, which are stopped in del_gendisk. ...
How severe is CVE-2022-49694?
CVE-2022-49694 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-49694?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.