cve/2018/CVE-2018-15572.md

### [CVE-2018-15572](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-15572)
![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brighgreen)

### Description

The spectre_v2_select_mitigation function in arch/x86/kernel/cpu/bugs.c in the Linux kernel before 4.18.1 does not always fill RSB upon a context switch, which makes it easier for attackers to conduct userspace-userspace spectreRSB attacks.

### POC

#### Reference
- https://usn.ubuntu.com/3777-1/
- https://usn.ubuntu.com/3777-2/
- https://usn.ubuntu.com/3777-3/

#### Github
- https://github.com/codexlynx/hardware-attacks-state-of-the-art
- https://github.com/elivepatch/livepatch-overlay