cve/2024/CVE-2024-49960.md

### [CVE-2024-49960](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-49960)
![](https://img.shields.io/static/v1?label=Product&message=Linux&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2%3C%207aac0c17a8cdf4a3236991c1e60435c6a984076c%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:ext4: fix timer use-after-free on failed mountSyzbot has found an ODEBUG bug in ext4_fill_superThe del_timer_sync function cancels the s_err_report timer,which reminds about filesystem errors daily. We shouldguarantee the timer is no longer active before kfree(sbi).When filesystem mounting fails, the flow goes to failed_mount3,where an error occurs when ext4_stop_mmpd is called, causinga read I/O failure. This triggers the ext4_handle_error functionthat ultimately re-arms the timer,leaving the s_err_report timer active before kfree(sbi) is called.Fix the issue by canceling the s_err_report timer after calling ext4_stop_mmpd.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/Fayzak/llm-analyze-know-vulnerabilities-open-source
- https://github.com/YariKar/llm-analyse-known-open-source-vulnerabilities