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CVE-2024-56584

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: io_uring/tctx: work around xa_store() allocation error issue syzbot triggered the following WARN_ON: WARNING: CPU: 0 PID: 16 a…

Published Dec 27, 2024CWE-770EPSS 0.24%

Overview

CVE-2024-56584 is a medium-severity vulnerability. It was published on December 27, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. 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/tctx: work around xa_store() allocation error issue

syzbot triggered the following WARN_ON:

WARNING: CPU: 0 PID: 16 at io_uring/tctx.c:51 __io_uring_free+0xfa/0x140 io_uring/tctx.c:51

which is the

WARN_ON_ONCE(!xa_empty(&tctx->xa));

sanity check in __io_uring_free() when a io_uring_task is going through

its final put. The syzbot test case includes injecting memory allocation

failures, and it very much looks like xa_store() can fail one of its

memory allocations and end up with ->head being non-NULL even though no

entries exist in the xarray.

Until this issue gets sorted out, work around it by attempting to

iterate entries in our xarray, and WARN_ON_ONCE() if one is found.

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/3a84fa784710990964c1e35df743851ab2863898Refgit.kernel.org/stable/c/42882b583095dcf747da6e3af1daeff40e27033eRefgit.kernel.org/stable/c/7eb75ce7527129d7f1fee6951566af409a37a1c4Refgit.kernel.org/stable/c/94ad56f61b873ffeebcc620d451eacfbdf9d40f0Refgit.kernel.org/stable/c/d5b2ddf1f90c7248eff9630b95895c8950f2f36dRefgit.kernel.org/stable/c/e05c070b401f6365c503e2b59f091331965c4fb9Reflists.debian.org/debian-lts-announce/2025/03/msg00001.html

How CyberStrike helps

Frequently asked questions

What is CVE-2024-56584?

CVE-2024-56584 is a medium-severity vulnerability. It was published on December 27, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-56584?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2024-56584?

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-2024-56584?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-56584 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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