What is CVE-2026-42495?

CVE-2026-42495 is a medium-severity vulnerability in Xen, classified under Integer Underflow. CVSS score: 5.5/10. Published 2026-07-28.

How severe is CVE-2026-42495?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Integer overflow in Xen

CVE-2026-42495

[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…

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)

CWE-191 — Integer Underflow

References

security@xen.org

Frequently asked questions

What is CVE-2026-42495?: CVE-2026-42495 is a medium-severity vulnerability in Xen, classified under Integer Underflow. CVSS score: 5.5/10. Published 2026-07-28.
How severe is CVE-2026-42495?: Medium severity. CVSS v3 base score is 5.5 out of 10.