cve/2023/CVE-2023-42753.md

### [CVE-2023-42753](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-42753)
![](https://img.shields.io/static/v1?label=Product&message=Red%20Hat%20Enterprise%20Linux%206&color=blue)
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![](https://img.shields.io/static/v1?label=Vulnerability&message=Out-of-bounds%20Write&color=brighgreen)

### Description

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.

### POC

#### Reference
- http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.html
- https://seclists.org/oss-sec/2023/q3/216
- https://www.openwall.com/lists/oss-security/2023/09/22/10

#### Github
- https://github.com/EGI-Federation/SVG-advisories