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

Published: 2023-04-25 | Updated: 2023-06-26

Risk	Low
Patch available	YES
Number of vulnerabilities	1
CVE-ID	CVE-2023-0386
CWE-ID	CWE-264
Exploitation vector	Local
Public exploit	Public exploit code for vulnerability #1 is available.
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) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU74410

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2023-0386

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: Yes

Description

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

The vulnerability exists due to unauthorized access to execution of setuid files in OverlayFS subsystem when copying a capable file from a nosuid mount into another mount. A local user can execute arbitrary code with root privileges.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

kernel-rt (Red Hat package): before 5.14.0-70.53.1.rt21.124.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-2023:1980

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?