What is CVE-2026-42494?

CVE-2026-42494 is a medium-severity vulnerability in Xen, classified under Out-of-bounds Read. CVSS score: 6.1/10. Published 2026-07-28.

How severe is CVE-2026-42494?

Medium severity. CVSS v3 base score is 6.1 out of 10.

Out-of-bounds Read in Xen

CVE-2026-42494

[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…

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H.

Affected products

Xen — versions consult Xen advisory XSA-497

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

security@xen.org

Frequently asked questions

What is CVE-2026-42494?: CVE-2026-42494 is a medium-severity vulnerability in Xen, classified under Out-of-bounds Read. CVSS score: 6.1/10. Published 2026-07-28.
How severe is CVE-2026-42494?: Medium severity. CVSS v3 base score is 6.1 out of 10.