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

Published: 2022-12-16 | Updated: 2023-06-08

Risk	Medium
Patch available	YES
Number of vulnerabilities	4
CVE-ID	CVE-2022-1158 CVE-2022-2639 CVE-2022-2959 CVE-2022-43945
CWE-ID	CWE-787 CWE-191 CWE-362 CWE-119
Exploitation vector	Network
Public exploit	Public exploit code for vulnerability #2 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_30_1 (Red Hat package) Operating systems & Components / Operating system package or component kpatch-patch-5_14_0-70_26_1 (Red Hat package) Operating systems & Components / Operating system package or component kpatch-patch-5_14_0-70_22_1 (Red Hat package) Operating systems & Components / Operating system package or component kpatch-patch-5_14_0-70_17_1 (Red Hat package) Operating systems & Components / Operating system package or component kpatch-patch-5_14_0-70_13_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 4 vulnerabilities.

1) Out-of-bounds write

EUVDB-ID: #VU63166

Risk: Medium

CVSSv4.0: 4.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-1158

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

Exploit availability: No

Description

The vulnerability allows a remote user to perform a denial of service (DoS) attack.

The vulnerability exists due the KVM implementation in Linux kernel does not properly perform guest page table updates in some situations. A remote user on the guest operating system can trigger memory corruption and perform a denial of service attack against the host OS.

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_30_1 (Red Hat package): before 1-1.el9_0

kpatch-patch-5_14_0-70_26_1 (Red Hat package): before 1-3.el9_0

kpatch-patch-5_14_0-70_22_1 (Red Hat package): before 1-4.el9_0

kpatch-patch-5_14_0-70_17_1 (Red Hat package): before 1-4.el9_0

kpatch-patch-5_14_0-70_13_1 (Red Hat package): before 1-5.el9_0

CPE2.3

External links

https://access.redhat.com/errata/RHSA-2022:9082

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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

2) Integer underflow

EUVDB-ID: #VU66812

Risk: Low

CVSSv4.0: 7.1 [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:P/U:Clear]

CVE-ID: CVE-2022-2639

CWE-ID: CWE-191 - Integer underflow

Exploit availability: Yes

Description

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

The vulnerability exists due to integer underflow within the reserve_sfa_size() function in the openvswitch kernel module in Linux kernel. A local user can trigger an out-of-bounds read error and crash the system or escalate privileges.