high
7.8
CWE
787
Advisory Published
CVE Published
Updated

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

First published: Wed Sep 20 2023(Updated: )

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.

Credit: secalert@redhat.com secalert@redhat.com secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
redhat/kernel<6.6
6.6
Linux Kernel<6.6
Red Hat Enterprise Linux=7.0
Red Hat Enterprise Linux=8.0
Red Hat Enterprise Linux=9.0
Linux Kernel>=4.4.165<4.5
Linux Kernel>=4.9.141<4.10
Linux Kernel>=4.14.84<4.15
Linux Kernel>=4.19.5<4.19.295
Linux Kernel>=4.20<5.4.257
Linux Kernel>=5.5<5.10.195
Linux Kernel>=5.11<5.15.132
Linux Kernel>=5.16<6.1.53
Linux Kernel>=6.2<6.4.16
Linux Kernel>=6.5<6.5.3
Debian GNU/Linux=10.0
debian/linux
5.10.223-1
5.10.226-1
6.1.123-1
6.1.128-1
6.12.12-1
6.12.13-1
IBM Security Verify Governance - Identity Manager<=ISVG 10.0.2
IBM Security Verify Governance, Identity Manager<=ISVG 10.0.2

Remedy

https://git.kernel.org/linus/886503f34d63e681662057448819edb5b1057a97

Remedy

https://git.kernel.org/linus/050d91c03b28ca479df13dfb02bcd2c60dd6a878

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Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the severity of CVE-2023-42753?

    CVE-2023-42753 has been categorized as a medium severity vulnerability.

  • How do I fix CVE-2023-42753?

    To mitigate CVE-2023-42753, update the kernel to version 6.6 or later for affected systems.

  • What systems are affected by CVE-2023-42753?

    CVE-2023-42753 impacts various versions of the Linux kernel and certain Red Hat and Debian distributions.

  • What type of vulnerability is CVE-2023-42753?

    CVE-2023-42753 is an array indexing vulnerability within the netfilter subsystem of the Linux kernel.

  • What could an attacker exploit in CVE-2023-42753?

    An attacker could exploit CVE-2023-42753 to perform arbitrary memory buffer out-of-bounds operations.

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