CVE-2021-47280

A vulnerability was found in the Linux kernel's DRM, where the drm_getunique() function can read a pointer after it has been freed. This occurs because the function retrieves a pointer without properly locking the device's master mutex, leading to a potential crash if another process modifies the pointer first.

This vulnerability is rated as a moderate severity because the risk of crash and instability in the system requires specific conditions related to concurrent access to the device's resources.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.