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CVE-2026-23423

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: btrfs: free pages on error in btrfs_uring_read_extent() In this function the 'pages' object is never freed in the hopes that it…

Published Apr 3, 2026CWE-401EPSS 0.12%

Overview

CVE-2026-23423 is a medium-severity vulnerability. It was published on April 3, 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:

btrfs: free pages on error in btrfs_uring_read_extent()

In this function the 'pages' object is never freed in the hopes that it is

picked up by btrfs_uring_read_finished() whenever that executes in the

future. But that's just the happy path. Along the way previous

allocations might have gone wrong, or we might not get -EIOCBQUEUED from

btrfs_encoded_read_regular_fill_pages(). In all these cases, we go to a

cleanup section that frees all memory allocated by this function without

assuming any deferred execution, and this also needs to happen for the

'pages' allocation.

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/3f501412f2079ca14bf68a18d80a2b7a823f1f64Refgit.kernel.org/stable/c/628895890b0c9ac9129129e89455da7db95ba343Refgit.kernel.org/stable/c/d4f210de01eaccac61eee657f676045ef9771d07

How CyberStrike helps

Frequently asked questions

What is CVE-2026-23423?

CVE-2026-23423 is a medium-severity vulnerability. It was published on April 3, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-23423?

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-2026-23423?

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-2026-23423?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-23423 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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