CVE-2026-0665

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.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.0 / Impact : 4.0

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://access.redhat.com/security/cve/CVE-2026-0665
https://bugzilla.redhat.com/show_bug.cgi?id=2428640

Configurations

No configuration.

History

15 Apr 2026, 00:35

Type	Values Removed	Values Added
Summary		(es) Se encontró un error 'off-by-one' (desbordamiento por un elemento) en el soporte de QEMU para invitados KVM Xen. Un invitado malicioso podría aprovechar este fallo para desencadenar accesos fuera de límite a la pila en el proceso de QEMU a través de la interfaz de hiperllamada physdev de Xen emulada, lo que llevaría a una denegación de servicio o a una posible corrupción de memoria.

18 Feb 2026, 21:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-02-18 21:16

Updated : 2026-06-17 10:11

NVD link : CVE-2026-0665

Mitre link : CVE-2026-0665

CVE.ORG link : CVE-2026-0665

JSON object : View

Products Affected

No product.

CWE

CWE-787

Out-of-bounds Write

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