Red Hat Enterprise Linux 9.0 Extended Update Support update for kpatch-patch

Published: 2023-11-23 | Updated: 2025-01-10

Risk	Low
Patch available	YES
Number of vulnerabilities	5
CVE-ID	CVE-2023-3776 CVE-2023-3812 CVE-2023-4004 CVE-2023-4147 CVE-2023-42753
CWE-ID	CWE-416 CWE-787
Exploitation vector	Local
Public exploit	Public exploit code for vulnerability #3 is available. Public exploit code for vulnerability #4 is available.
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-5_14_0-70_75_1 (Red Hat package) Operating systems & Components / Operating system package or component kpatch-patch-5_14_0-70_70_1 (Red Hat package) Operating systems & Components / Operating system package or component kpatch-patch-5_14_0-70_64_1 (Red Hat package) Operating systems & Components / Operating system package or component kpatch-patch-5_14_0-70_58_1 (Red Hat package) Operating systems & Components / Operating system package or component kpatch-patch-5_14_0-70_53_1 (Red Hat package) Operating systems & Components / Operating system package or component Red Hat Enterprise Linux for Power, little endian - Extended Update Support 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 5 vulnerabilities.

1) Use-after-free

EUVDB-ID: #VU79285

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-2023-3776

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 the Linux kernel's net/sched: cls_fw 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: 9.0

Red Hat Enterprise Linux for Power, little endian - Extended Update Support: 9.0

Red Hat Enterprise Linux for x86_64 - Extended Update Support: 9.0

kpatch-patch-5_14_0-70_75_1 (Red Hat package): before 1-1.el9_0

kpatch-patch-5_14_0-70_70_1 (Red Hat package): before 1-2.el9_0

kpatch-patch-5_14_0-70_64_1 (Red Hat package): before 1-3.el9_0

kpatch-patch-5_14_0-70_58_1 (Red Hat package): before 1-4.el9_0

kpatch-patch-5_14_0-70_53_1 (Red Hat package): before 1-5.el9_0

CPE2.3

External links

https://access.redhat.com/errata/RHSA-2023:7411

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: #VU78928

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-2023-3812

CWE-ID: CWE-787 - Out-of-bounds write

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/TAP device driver in Linux kernel. A local user can trigger an out-of-bounds write and execute arbitrary code with elevated privileges.