CVE-2022-45919

A race condition flaw leading to a use-after-free issue was found in the Linux kernel media subsystem in the DVB CA EN50221 interface of the DVB core device driver. It could occur in the dvb_ca_en50221_release() function if there is a disconnect after an open, because of the lack of a wait_event. A local user could use this flaw to crash the system or potentially escalate their privileges on the system.

Because this vulnerability requires an attacker to either have physical access to a system with DVB hardware or requires a remote authenticated user to have knowledge about DVB hardware attached to the system and when it is disconnected and reconnected, 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.