cve/2019/CVE-2019-8460.md

### [CVE-2019-8460](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-8460)
![](https://img.shields.io/static/v1?label=Product&message=OpenBSD&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-1049&color=brighgreen)

### Description

OpenBSD kernel version <= 6.5 can be forced to create long chains of TCP SACK holes that causes very expensive calls to tcp_sack_option() for every incoming SACK packet which can lead to a denial of service.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/alphaSeclab/sec-daily-2019
- https://github.com/vshaliii/DC-1-Vulnhub-Walkthrough