CVE-2026-0665

MEDIUM

Red Hat Enterprise Linux - Out-of-bounds Write via Xen Physdev Hypercall Interface

Title source: llm

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 (2)

Core 2

Core References

Vendor Advisory vdb-entry x_refsource_redhat

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

Issue Tracking issue-tracking x_refsource_redhat

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

Scores

CVSS v3 6.5

EPSS 0.0001

EPSS Percentile 0.8%

Attack Vector LOCAL

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-787

Status published

Products (6)

Red Hat/Red Hat Enterprise Linux 10

Red Hat/Red Hat Enterprise Linux 6

Red Hat/Red Hat Enterprise Linux 7

Red Hat/Red Hat Enterprise Linux 8

Red Hat/Red Hat Enterprise Linux 9

Red Hat/Red Hat OpenShift Container Platform 4

Published Feb 18, 2026

Tracked Since Feb 19, 2026