CVE-2023-42753 HIGH

CVE-2023-42753: Kernel: netfilter: potential slab-out-of-bound access due to integer underflow

Vendor Red Hat
Product Red Hat Enterprise Linux 7
Weakness CWE-787
Published September 25, 2023
Last update February 18, 2026

CVSS base score

7.0/10
Attack vector Local
Attack complexity High
Privileges required Low
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

What the vulnerability does

01Description

An array indexing vulnerability was found in the netfilter subsystem of the Linux kernel. A missing macro could lead to a miscalculation of the `h->nets` array offset, providing attackers with the primitive to arbitrarily increment/decrement a memory buffer out-of-bound. This issue may allow a local user to crash the system or potentially escalate their privileges on the system.

Key dates

02Disclosure timeline

September 25, 2023 CVE published
February 18, 2026 Record updated