Vulnerability in Xen

CVE-2026-62424

[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.

EPSS: 0.002 (9.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

Affected products

  • Xen — versions consult Xen advisory XSA-497

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-62424?
CVE-2026-62424 is a medium-severity vulnerability in Xen, classified under Improper Handling of Length Parameter Inconsistency. CVSS score: 5.5/10. Published 2026-07-28.
How severe is CVE-2026-62424?
Medium severity. CVSS v3 base score is 5.5 out of 10.