cve/2024/CVE-2024-49936.md

### [CVE-2024-49936](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-49936)
![](https://img.shields.io/static/v1?label=Product&message=Linux&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=&color=brightgreen)
![](https://img.shields.io/static/v1?label=Version&message=4.7%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Version&message=40d8abdee806d496a60ee607a6d01b1cd7fabaf0%20&color=brightgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=blue)

### Description

In the Linux kernel, the following vulnerability has been resolved:net/xen-netback: prevent UAF in xenvif_flush_hash()During the list_for_each_entry_rcu iteration call of xenvif_flush_hash,kfree_rcu does not exist inside the rcu read critical section, so ifkfree_rcu is called when the rcu grace period ends during the iteration,UAF occurs when accessing head->next after the entry becomes free.Therefore, to solve this, you need to change it to list_for_each_entry_safe.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/w4zu/Debian_security