CVE-2026-0665

medium

Description

An off-by-one error was found in QEMU's KVM Xen guest support. A malicious guest could use this flaw to trigger out-of-bounds heap accesses in the QEMU process via the emulated Xen physdev hypercall interface, leading to a denial of service or potential memory corruption.

References

https://bugzilla.redhat.com/show_bug.cgi?id=2428640

https://access.redhat.com/security/cve/CVE-2026-0665

Details

Source: Mitre, NVD

Published: 2026-02-18

Updated: 2026-02-19

Risk Information

CVSS v2

Base Score: 5.2

Vector: CVSS2#AV:L/AC:L/Au:S/C:N/I:P/A:C

Severity: Medium

CVSS v3

Base Score: 6.5

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

Severity: Medium

EPSS

EPSS: 0.00006