Red Hat Enterprise Linux 9.0 Extended Update Support update for kernel-rt

Published: 2023-03-27
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2022-4744
Exploitation vector Local
Public exploit N/A
Vulnerable software
kernel-rt (Red Hat package)
Operating systems & Components / Operating system package or component

Vendor Red Hat Inc.

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Double Free

EUVDB-ID: #VU74053

Risk: Low


CVE-ID: CVE-2022-4744

CWE-ID: CWE-415 - Double Free

Exploit availability: No


The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error within the tun_free_netdev() function in the Linux kernel’s TUN/TAP device driver. A local user can trigger a double free error and execute arbitrary code with elevated privileges.


Install updates from vendor's website.

Vulnerable software versions

kernel-rt (Red Hat package): before 5.14.0-70.50.2.rt21.122.el9_0

CPE2.3 External links

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?