cve/2024/CVE-2024-56709.md

### [CVE-2024-56709](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-56709)
![](https://img.shields.io/static/v1?label=Product&message=Linux&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=773af69121ecc6c53d192661af8d53bb3db028ae%3C%20534d59ab38010aada88390db65985e65d0de7d9e%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brighgreen)

### Description

In the Linux kernel, the following vulnerability has been resolved:io_uring: check if iowq is killed before queuingtask work can be executed after the task has gone through io_uringtermination, whether it's the final task_work run or the fallback path.In this case, task work will find ->io_wq being already killed andnull'ed, which is a problem if it then tries to forward the request toio_queue_iowq(). Make io_queue_iowq() fail requests in this case.Note that it also checks PF_KTHREAD, because the user can first closea DEFER_TASKRUN ring and shortly after kill the task, in which case->iowq check would race.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/cku-heise/euvd-api-doc
- https://github.com/oogasawa/Utility-security