Description
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.
Metrics
CVSS 3.1 5.5/10
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HAffected software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 773af69121ecc6c53d192661af8d53bb3db028ae, < 534d59ab38010aada88390db65985e65d0de7d9e; >= 773af69121ecc6c53d192661af8d53bb3db028ae, < 2ca94c8de36091067b9ce7527ae8db3812d38781; >= 773af69121ecc6c53d192661af8d53bb3db028ae, < 4f95a2186b7f2af09331e1e8069bcaf34fe019cf; >= 773af69121ecc6c53d192661af8d53bb3db028ae, < dbd2ca9367eb19bc5e269b8c58b0b1514ada9156 |
| Linux | Linux | 5.14 |
References
- https://git.kernel.org/stable/c/2ca94c8de36091067b9ce7527ae8db3812d38781Patch
- https://git.kernel.org/stable/c/4f95a2186b7f2af09331e1e8069bcaf34fe019cfPatch
- https://git.kernel.org/stable/c/534d59ab38010aada88390db65985e65d0de7d9ePatch
- https://git.kernel.org/stable/c/dbd2ca9367eb19bc5e269b8c58b0b1514ada9156Patch
- https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html
Timeline
- Published
- Dec 29, 2024
- Last modified
- Aug 4, 2026
- NVD status
- Modified