CVE-2024-56709 (GCVE-0-2024-56709)
Vulnerability from cvelistv5
Published
2024-12-29 08:42
Modified
2025-05-04 10:03
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: io_uring: check if iowq is killed before queuing task work can be executed after the task has gone through io_uring termination, whether it's the final task_work run or the fallback path. In this case, task work will find ->io_wq being already killed and null'ed, which is a problem if it then tries to forward the request to io_queue_iowq(). Make io_queue_iowq() fail requests in this case. Note that it also checks PF_KTHREAD, because the user can first close a DEFER_TASKRUN ring and shortly after kill the task, in which case ->iowq check would race.
References
Impacted products
Vendor Product Version
Linux Linux Version: 773af69121ecc6c53d192661af8d53bb3db028ae
Version: 773af69121ecc6c53d192661af8d53bb3db028ae
Version: 773af69121ecc6c53d192661af8d53bb3db028ae
Version: 773af69121ecc6c53d192661af8d53bb3db028ae
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  }
}


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