CVE-2026-0665 MEDIUM

CVE-2026-0665: Qemu-kvm: heap off-by-one in kvm xen physdevop_map_pirq

Vendor Red Hat
Product Red Hat Enterprise Linux 10
Weakness CWE-787
Published February 18, 2026
Last update February 18, 2026
View on NVD All CVEs

CVSS base score

6.5/10
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality None
Integrity None

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

February 18, 2026 CVE published
February 18, 2026 Record updated