CVE-2026-10047 Out-of-bounds write in Napoca real-mode hook handler via guest-controlled SS:SP (VA-13905)
An attacker can trigger an out-of-bounds write in the Bitdefender Napoca hypervisor via guest-controlled registers, potentially leading to code execution or privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-10047?
CVE-2026-10047 is a high-severity memory corruption vulnerability in Bitdefender Napoca bare-metal hypervisor, published on 2 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-787
Which versions are affected by CVE-2026-10047?
It affects 1 product.
Products include Bitdefender Napoca.
How do I fix CVE-2026-10047?
No fix has been published for CVE-2026-10047 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-10047 being exploited?
There is no known exploitation of CVE-2026-10047 in the wild and no public exploit code.
Other vulnerabilities in Bitdefender Napoca bare-metal hypervisor
Sources
Also known as GHSA-m94v-7gjf-wmxq.