CVE-2026-0665CWE-787
Qemu-kvm: heap off-by-one in kvm xen physdevop_map_pirq
Medium · published February 18, 2026
What it is
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.
The record
Technical detail
- CVSS v3.1
- 6.5 · MEDIUM
- Vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
- CVSS v4.0
- Not supplied
- EPSS
- 0.00168 · 5.8th percentile
- Weakness
- CWE-787 · Out-of-bounds Write
- Published
- 2026-02-18T20:50Z
EPSS history
Timeline