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CVE-2026-23259

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: io_uring/rw: free potentially allocated iovec on cache put failure If a read/write request goes through io_req_rw_cleanup() and…

Published Mar 18, 2026EPSS 0.10%

Overview

CVE-2026-23259 is a medium-severity vulnerability. It was published on March 18, 2026 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/rw: free potentially allocated iovec on cache put failure

If a read/write request goes through io_req_rw_cleanup() and has an

allocated iovec attached and fails to put to the rw_cache, then it may

end up with an unaccounted iovec pointer. Have io_rw_recycle() return

whether it recycled the request or not, and use that to gauge whether to

free a potential iovec or not.

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/1d5f2329ab4df65c2ee011b986d8a6e05ad0f67cRefgit.kernel.org/stable/c/4b9748055457ac3a0710bf210c229d01ea1b01b9

How CyberStrike helps

Frequently asked questions

What is CVE-2026-23259?

CVE-2026-23259 is a medium-severity vulnerability. It was published on March 18, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-23259?

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-2026-23259?

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-2026-23259?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-23259 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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