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CVE-2024-56709

7.8 · HIGH

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…

Published Dec 29, 2024EPSS 0.22%

Overview

CVE-2024-56709 is a high-severity vulnerability. It was published on December 29, 2024 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/2ca94c8de36091067b9ce7527ae8db3812d38781Refgit.kernel.org/stable/c/4f95a2186b7f2af09331e1e8069bcaf34fe019cfRefgit.kernel.org/stable/c/534d59ab38010aada88390db65985e65d0de7d9eRefgit.kernel.org/stable/c/dbd2ca9367eb19bc5e269b8c58b0b1514ada9156Reflists.debian.org/debian-lts-announce/2025/03/msg00001.html

How CyberStrike helps

Frequently asked questions

What is CVE-2024-56709?

CVE-2024-56709 is a high-severity vulnerability. It was published on December 29, 2024 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2024-56709?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2024-56709?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2024-56709?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-56709 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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