CVE-2026-0665

MEDIUM
2026-02-18 [email protected]
6.5
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

3
Patch Released
Apr 09, 2026 - 14:30 nvd
Patch available
Analysis Generated
Mar 12, 2026 - 21:55 vuln.today
CVE Published
Feb 18, 2026 - 21:16 nvd
MEDIUM 6.5

Tags

Memory Corruption Denial Of Service Redhat Suse

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.

Analysis

QEMU's KVM Xen guest support contains an off-by-one error in the physdev hypercall interface that allows authenticated guest users to trigger out-of-bounds heap memory access within the hypervisor process. This vulnerability can lead to denial of service through memory corruption, potentially affecting virtualized environments running QEMU with Xen guest support enabled. …

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Remediation

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

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Priority Score

33
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +32
POC: 0

Vendor Status

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CVE-2026-0665 vulnerability details – vuln.today
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