Red Hat Enterprise Linux 8.4 Extended Update Support update for kpatch-patch

Published: 2023-04-05

Risk	High
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2023-0266 CVE-2023-0461
CWE-ID	CWE-416
Exploitation vector	Local
Public exploit	Vulnerability #1 is being exploited in the wild.
Vulnerable software	Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions Operating systems & Components / Operating system package or component kpatch-patch-4_18_0-305_82_1 (Red Hat package) Operating systems & Components / Operating system package or component kpatch-patch-4_18_0-305_76_1 (Red Hat package) Operating systems & Components / Operating system package or component kpatch-patch-4_18_0-305_72_1 (Red Hat package) Operating systems & Components / Operating system package or component kpatch-patch-4_18_0-305_71_1 (Red Hat package) Operating systems & Components / Operating system package or component kpatch-patch-4_18_0-305_65_1 (Red Hat package) Operating systems & Components / Operating system package or component Red Hat Enterprise Linux Server - TUS Operating systems & Components / Operating system Red Hat Enterprise Linux for Power, little endian - Extended Update Support Operating systems & Components / Operating system Red Hat Enterprise Linux Server - AUS Operating systems & Components / Operating system Red Hat Enterprise Linux for x86_64 - Extended Update Support Operating systems & Components / Operating system
Vendor	Red Hat Inc.

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Use-after-free

EUVDB-ID: #VU71482

Risk: High

CVSSv4.0: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Amber]

CVE-ID: CVE-2023-0266

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

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

The vulnerability exists due to a use-after-free error within the snd_ctl_elem_read() function in the Linux kernel sound subsystem. A local user can trigger a use-after-free error and execute arbitrary code on the system.

Note, the vulnerability is being actively exploited in the wild.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions: 8.4

Red Hat Enterprise Linux Server - TUS: 8.4

Red Hat Enterprise Linux for Power, little endian - Extended Update Support: 8.4

Red Hat Enterprise Linux Server - AUS: 8.4

Red Hat Enterprise Linux for x86_64 - Extended Update Support: 8.4

kpatch-patch-4_18_0-305_82_1 (Red Hat package): before 1-1.el8_4

kpatch-patch-4_18_0-305_76_1 (Red Hat package): before 1-2.el8_4

kpatch-patch-4_18_0-305_72_1 (Red Hat package): before 1-3.el8_4

kpatch-patch-4_18_0-305_71_1 (Red Hat package): before 1-4.el8_4

kpatch-patch-4_18_0-305_65_1 (Red Hat package): before 1-5.el8_4

CPE2.3

External links

https://access.redhat.com/errata/RHSA-2023:1662

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.

2) Use-after-free

EUVDB-ID: #VU72506

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2023-0461