Red Hat Enterprise Linux 8.6 Extended Update Support update for kpatch-patch

Published: 2024-02-15

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2023-4921 CVE-2024-0646
CWE-ID	CWE-416 CWE-787
Exploitation vector	Local
Public exploit	N/A
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_0-372_87_1 (Red Hat package) Operating systems & Components / Operating system package or component kpatch-patch-4_18_0-372_80_1 (Red Hat package) Operating systems & Components / Operating system package or component kpatch-patch-4_18_0-372_75_1 (Red Hat package) Operating systems & Components / Operating system package or component kpatch-patch-4_18_0-372_70_1 (Red Hat package) Operating systems & Components / Operating system package or component kpatch-patch-4_18_0-372_64_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: #VU81693

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-2023-4921

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 in the qfq_dequeue() function within the the Linux kernel's net/sched: sch_qfq component. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions: 8.6

Red Hat Enterprise Linux Server - TUS: 8.6

Red Hat Enterprise Linux for Power, little endian - Extended Update Support: 8.6

Red Hat Enterprise Linux Server - AUS: 8.6

Red Hat Enterprise Linux for x86_64 - Extended Update Support: 8.6

kpatch-patch-4_18_0-372_87_1 (Red Hat package): before 1-1.el8_6

kpatch-patch-4_18_0-372_80_1 (Red Hat package): before 1-2.el8_6

kpatch-patch-4_18_0-372_75_1 (Red Hat package): before 1-3.el8_6

kpatch-patch-4_18_0-372_70_1 (Red Hat package): before 1-4.el8_6

kpatch-patch-4_18_0-372_64_1 (Red Hat package): before 1-5.el8_6

CPE2.3

External links

https://access.redhat.com/errata/RHSA-2024:0851

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?

No. We are not aware of malware exploiting this vulnerability.

2) Out-of-bounds write

EUVDB-ID: #VU86246