Red Hat Enterprise Linux 8.1 Update Services for SAP Solutions update for kernel

1) Integer underflow

EUVDB-ID: #VU66812

Risk: Low

CVSSv3.1: 7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]

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.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions: 8.1

kernel (Red Hat package): before 4.18.0-147.78.1.el8_1

External links

http://access.redhat.com/errata/RHSA-2023:0058

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. However, proof of concept for this vulnerability is available.