{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-10046", "assignerOrgId": "b3d5ebe7-963e-41fb-98e1-2edaeabb8f82", "state": "PUBLISHED", "assignerShortName": "Bitdefender", "dateReserved": "2026-05-28T22:57:29.491Z", "datePublished": "2026-06-02T14:16:21.927Z", "dateUpdated": "2026-06-02T16:06:21.781Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "b3d5ebe7-963e-41fb-98e1-2edaeabb8f82", "shortName": "Bitdefender", "dateUpdated": "2026-06-02T14:16:21.927Z"}, "title": "Out-of-bounds write in Napoca BIOS INT 0x15 E820 memory map handler (VA-13905)", "datePublic": "2026-05-29T06:02:00.000Z", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-787", "description": "CWE-787: Out-of-bounds Write", "type": "CWE"}]}], "impacts": [{"descriptions": [{"lang": "en", "value": "Overflow Buffers"}]}], "affected": [{"vendor": "Bitdefender", "product": "Napoca bare-metal hypervisor", "repo": "https://github.com/bitdefender/napoca", "versions": [{"status": "affected", "version": "all"}], "defaultStatus": "affected"}], "descriptions": [{"lang": "en", "value": "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.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>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.</p>"}]}], "tags": ["unsupported-when-assigned"], "references": [{"url": "https://www.bitdefender.com/consumer/support/security-advisories/out-of-bounds-write-in-napoca-bios-int-0x15-e820-memory-map-handler-va-13905"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "HIGH", "baseScore": 8.5, "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"}}], "workarounds": [{"lang": "en", "value": "No workaround is available.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>No workaround is available.</p>"}]}], "solutions": [{"lang": "en", "value": "No fix is planned because Bitdefender Napoca is end-of-life. Users should discontinue use of the unsupported product.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>No fix is planned because Bitdefender Napoca is end-of-life. Users should discontinue use of the unsupported product.</p>"}]}], "credits": [{"lang": "en", "value": "Sebasti\u00e1n Alba Vives (@Sebasteuo / 0xS4bb1)", "type": "finder"}], "source": {"discovery": "EXTERNAL"}, "x_generator": {"engine": "Vulnogram 1.0.2"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-06-02T16:06:13.975351Z", "id": "CVE-2026-10046", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-06-02T16:06:21.781Z"}}]}}

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