CVE-2026-10046
Severity CVSS v4.0:
HIGH
Type:
CWE-787
Out-of-bounds Write
Publication date:
02/06/2026
Last modified:
08/06/2026
Description
Bitdefender Napoca bare-metal hypervisor contains an out-of-bounds write vulnerability in the BIOS INT 0x15 / E820 memory map handler, implemented in napoca/guests/bios_handlers.c. The handler computes a destination offset into the guest RealModeMemory buffer from guest-controlled ES and EDI register values without validating that the resulting address remains within the 1MB RealModeMemory allocation. A malicious guest operating in real mode can trigger the issue by invoking INT 0x15 with AX=0xE820, EDX=0x534D4150, ECX greater than or equal to 20, EBX=0, ES=0xFFFF, and EDI=0xFFFF. This can cause a write of up to 20 bytes past the end of the RealModeMemory buffer into the hypervisor heap. The product is end-of-life and unsupported when assigned.
Impact
Base Score 4.0
8.50
Severity 4.0
HIGH
Base Score 3.x
7.80
Severity 3.x
HIGH
Vulnerable products and versions
| CPE | From | Up to |
|---|---|---|
| cpe:2.3:a:bitdefender:napoca:*:*:*:*:*:*:*:* |
To consult the complete list of CPE names with products and versions, see this page