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
CWE-ID	CWE-415
Exploitation vector	Local
Public exploit	N/A
Vulnerable software Subscribe	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

CVSSv3.1:

CVE-ID: CVE-2022-4744

CWE-ID: CWE-415 - Double Free

Exploit availability: No

Description

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.

Mitigation

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

cpe:2.3:o:red_hat:kernel-rt_redhat_package:*:*:*:*:*:red_hat_enterprise_linux:*:

External links

http://access.redhat.com/errata/RHSA-2023:1467

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?