Linux · Linux Kernel · CVE-2021-28964
**Name of the Vulnerable Software and Affected Versions**
Linux kernel versions through 5.11.8
**Description**
A race condition was discovered in `get old root` in `fs/btrfs/ctree.c`. It allows attackers to cause a denial of service because of a lack of locking on an extent buffer before a cloning operation. This issue is related to errors in synchronization when using a shared resource.
**Recommendations**
For Linux kernel versions through 5.11.8, update to a version that includes a fix for this issue.
At the moment, there is no information about a newer version that contains a fix for this vulnerability.