CVE-2022-45884

A race condition flaw leading to a use-after-free issue was found in the Linux kernel media subsystem in the DVB core device driver. It could occur in the dvb_register_device() function due to the file_operations structure (fops) being dynamically allocated and later kfreed. A local user could use this flaw to crash the system or potentially escalate their privileges on the system.

To exploit this vulnerability, an attacker must either have credentials for a vulnerable system and physical access to its ports, or they must have the elevated privileges necessary to control USB via sysfs. For that reason, Red Hat assesses the impact of this vulnerability as Moderate.

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.

To mitigate this issue, it is possible to prevent the affected code from being loaded by blacklisting the dvb-core kernel module. For instructions on how to blacklist a kernel module, please see https://access.redhat.com/solutions/41278.