CVE-2026-10047: The Bitdefender Napoca bare-metal hypervisor contains an out-of-bounds write vulnerability in the real-mode ho

Routine

HIGH 7.8MITIGATE

CVE-2026-10047 is a high-severity flaw (CVSS 7.8) affecting napoca. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

High severity

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.1% (top 98%)
CISA exploited list	No
Weakness	CWE-787
Published	2026-06-02
Last modified	2026-07-22

Publisher (CNA): Bitdefender · Vendor: bitdefender

Last updated 2026-07-22 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-02 16:16 UTCPublished CVE record published
2026-07-22 19:10 UTCUpdated Record last modified

bitdefender napoca MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy napoca || rpm -q napoca || napoca --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-10047?

napoca: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-10047 being exploited?

CVE-2026-10047 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-10047 affect?

CVE-2026-10047 affects napoca. Severity is high (CVSS 7.8). 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

How urgent is CVE-2026-10047?

Priority 28/100. High severity

Related CVEs

CVE-2026-10046 HIGH 7.8 MITIGATE Bitdefender Napoca bare-metal hypervisor contains an out-of-bounds write vulnerability in the BIOS INT 0x15 /

References

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