cve/2023/CVE-2023-42756.md

### [CVE-2023-42756](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-42756)
![](https://img.shields.io/static/v1?label=Product&message=Red%20Hat%20Enterprise%20Linux%206&color=blue)
![](https://img.shields.io/static/v1?label=Product&message=Red%20Hat%20Enterprise%20Linux%207&color=blue)
![](https://img.shields.io/static/v1?label=Product&message=Red%20Hat%20Enterprise%20Linux%208&color=blue)
![](https://img.shields.io/static/v1?label=Product&message=Red%20Hat%20Enterprise%20Linux%209&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=Concurrent%20Execution%20using%20Shared%20Resource%20with%20Improper%20Synchronization%20('Race%20Condition')&color=brighgreen)

### Description

A flaw was found in the Netfilter subsystem of the Linux kernel. A race condition between IPSET_CMD_ADD and IPSET_CMD_SWAP can lead to a kernel panic due to the invocation of `__ip_set_put` on a wrong `set`. This issue may allow a local user to crash the system.

### POC

#### Reference
- https://seclists.org/oss-sec/2023/q3/242

#### Github
No PoCs found on GitHub currently.