CVE-2026-62424
Received Received - Intake

Buffer Overflow in libfsimage ISO9660 Driver

Publication date: 2026-07-28

Last updated on: 2026-07-28

Assigner: Xen Project

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.

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Meta Information

Published
2026-07-28
Last Modified
2026-07-28
Generated
2026-07-28
AI Q&A
2026-07-28
EPSS Evaluated
N/A
NVD
CVE-2026-62424
EUVD
EUVD-2026-49775

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
xen libfsimage *

Helpful Resources

Exploitability

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CWE ID Description
CWE-UNKNOWN

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Executive Summary

CVE-2026-62424 is a vulnerability in the libfsimage's iso9660 driver within Xen. It involves incorrect handling of Rock Ridge NM record entry lengths derived from attacker-controlled on-disk fields without proper validation.

Detection Guidance

This vulnerability (CVE-2026-62424) involves improper handling of Rock Ridge NM record entry lengths in libfsimage's iso9660 driver. Detection requires examining filesystem parsing behavior rather than network scanning. Check for crashes or memory corruption when mounting ISO images with Rock Ridge extensions. Use tools like fsck or custom scripts to parse ISO metadata and validate record lengths.

Impact Analysis

This vulnerability could allow an attacker to cause a denial of service or potentially execute arbitrary code by crafting a malicious ISO file that exploits the unvalidated entry length in Rock Ridge NM record processing.

Mitigation Strategies

Apply the latest security patches or updates from Xen Project to address the libfsimage iso9660 driver vulnerabilities. Monitor official Xen security advisories for patches specific to CVE-2026-62424.

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