Riskcovery

CVE-2024-56709

io_uring: check if iowq is killed before queuing

State
Published
Severity
7.8 High
Published
Dec 29, 2024
Updated
Aug 5, 2026
Reserved
Dec 27, 2024

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
3.17.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HLinux

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 773af69121ecc6c53d192661af8d53bb3db028ae to before 534d59ab38010aada88390db65985e65d0de7d9eAffected
  • 773af69121ecc6c53d192661af8d53bb3db028ae to before 2ca94c8de36091067b9ce7527ae8db3812d38781Affected
  • 773af69121ecc6c53d192661af8d53bb3db028ae to before 4f95a2186b7f2af09331e1e8069bcaf34fe019cfAffected
  • 773af69121ecc6c53d192661af8d53bb3db028ae to before dbd2ca9367eb19bc5e269b8c58b0b1514ada9156Affected
LinuxLinux
  • 5.14Affected
  • before 5.14Not affected
  • 6.1.122 through 6.1.*Not affected
  • 6.6.68 through 6.6.*Not affected
  • 6.12.7 through 6.12.*Not affected
  • 6.13 and laterNot affected

References

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