CVE-2026-10047
CVE-2026-10047 is a high-severity vulnerability in Bitdefender Napoca with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.
Key facts
- Severity: High (CVSS 3.x base score 7.8)
- CVSS v4: 8.5
- EPSS exploit prediction: 0% (2nd percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-33944
- Weakness: CWE-787
- Affected product: Bitdefender Napoca
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2026-10047?
- 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.
- How severe is CVE-2026-10047?
- CVE-2026-10047 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2026-10047 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (2nd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-10047?
- CVE-2026-10047 affects Bitdefender Napoca. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-10047?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2026-10047 have an EU (EUVD) identifier?
- Yes. CVE-2026-10047 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-33944.
- When was CVE-2026-10047 published?
- CVE-2026-10047 was published on 2026-06-02 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:bitdefender:napoca:*:*:*:*:*:*:*:*
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