CVE-2026-0665
February 18, 2026
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.
Affected Packages
https://github.com/qemu/qemu.git (GITHUB):
Affected version(s) >=v10.1.0 <v10.1.4Fix Suggestion:
Update to version v10.1.4https://github.com/qemu/qemu.git (GITHUB):
Affected version(s) =v10.2.0 <v10.2.1Fix Suggestion:
Update to version v10.2.1https://github.com/qemu/qemu.git (GITHUB):
Affected version(s) >=v10.0.0 <v10.0.8Fix Suggestion:
Update to version v10.0.8Related Resources (2)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.2
Attack Vector
LOCAL
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
HIGH
CVSS v3
Base Score:
6.5
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Out-of-bounds Write
EPSS
Base Score:
0.01
