Vulnerability details

CVE-2024-56709

Linux Linux

io_uring: check if iowq is killed before queuing

CVSS 3.1

7.8High

Official 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.

CVSS scores

Score	Version	Source	Vector
7.8High	3.1	CVEProject cvelistV5 (CNA) (Linux)	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`

Affected products

Vendor	Product	Versions	Source
Linux	Linux	5.14	CVEProject cvelistV5 (CNA)
Linux	Linux	773af69121ecc6c53d192661af8d53bb3db028ae ≤ v < 534d59ab38010aada88390db65985e65d0de7d9e	CVEProject cvelistV5 (CNA)
Linux	Linux	773af69121ecc6c53d192661af8d53bb3db028ae ≤ v < 2ca94c8de36091067b9ce7527ae8db3812d38781	CVEProject cvelistV5 (CNA)
Linux	Linux	773af69121ecc6c53d192661af8d53bb3db028ae ≤ v < 4f95a2186b7f2af09331e1e8069bcaf34fe019cf	CVEProject cvelistV5 (CNA)
Linux	Linux	773af69121ecc6c53d192661af8d53bb3db028ae ≤ v < dbd2ca9367eb19bc5e269b8c58b0b1514ada9156	CVEProject cvelistV5 (CNA)

References and advisories

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Details

Published: 2024-12-29
Last updated: 2026-08-05
State: Published
Assigner (CNA): Linux

Exploit prediction (EPSS)

0.27%

Probability of exploitation in 30 days

19.3%

Percentile (among all CVEs)