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CVE-2026-62423

5.5 · MEDIUM

[This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] The directory and Rock Ridge / SUSP walk in libfsimage's iso9660 dr…

Published Jul 28, 2026CWE-130EPSS 0.20%

Overview

CVE-2026-62423 is a medium-severity vulnerability. It was published on July 28, 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. No authentication or special privileges are required for exploitation.

Technical description

[This CNA information record relates to multiple CVEs; the

text explains which aspects/vulnerabilities correspond to which CVE.]

The directory and Rock Ridge / SUSP walk in libfsimage's iso9660 driver

derives several lengths directly from attacker-controlled on-disk fields

without validating them:

* The directory loop itself assumes a good record length. This is

CVE-2026-42494.

* The calculation of the System Use area may underflow. This is

CVE-2026-42495.

* The Rock Ridge extension loop assumes a good (inner) record length.

This is CVE-2026-62423.

* The Rock Ridge NM record processing assumes a good entry length.

This is CVE-2026-62424.

* The Rock Ridge CE record processing assumes a good size and offset.

This is CVE-2026-62425.

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

Refxenbits.xenproject.org/xsa/advisory-497.html

How CyberStrike helps

Frequently asked questions

What is CVE-2026-62423?

CVE-2026-62423 is a medium-severity vulnerability. It was published on July 28, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-62423?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-62423?

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-2026-62423?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-62423 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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