CVE-2026-10047: bitdefender napoca bare-metal hypervisor Out-of-bounds Write

Vulnerability summary

CVE-2026-10047 is a high (CVSS 8.5) Out-of-bounds Write vulnerability in bitdefender napoca bare-metal hypervisor. EPSS estimates a 0.12% chance of exploitation in the next 30 days, higher than 1.6% of scored vulnerabilities.

Timeline

1. 02-06-2026
   PublishedVulnerability first disclosed.
2. 02-06-2026
   Last modifiedVulnerability information updated.

Description

The Bitdefender Napoca bare-metal hypervisor contains an out-of-bounds write vulnerability in the real-mode hook handler, implemented in napoca/kernel/handler.c. The handler uses a guest-controlled SS:SP-derived offset as an index into the 1MB RealModeMemory buffer without bounds validation. With SS=0xFFFF and ESP=0xFFFF, the computed offset can reach 0x10FFEF, exceeding the RealModeMemory buffer by 65,519 bytes. The IRET frame push can therefore write past the end of the buffer into the hypervisor heap. The product is end-of-life and unsupported when assigned.

• CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.