CVE-2026-5747

{"id": "CVE-2026-5747", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-5747", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-04-08T15:15:52.161794Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "HIGH", "confidentialityImpact": "HIGH"}, "impactScore": 6.0, "exploitabilityScore": 0.8}], "cvssMetricV40": [{"type": "Secondary", "source": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 8.7, "Automatable": "NOT_DEFINED", "attackVector": "LOCAL", "baseSeverity": "HIGH", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "HIGH", "attackRequirements": "PRESENT", "privilegesRequired": "HIGH", "subIntegrityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "affectedData": [{"vendor": "AWS", "product": "Firecracker", "versions": [{"status": "affected", "version": "1.13.0", "versionType": "custom", "lessThanOrEqual": "1.14.3"}, {"status": "affected", "version": "1.15.0"}, {"status": "unaffected", "version": "1.14.4"}, {"status": "unaffected", "version": "1.15.1"}], "defaultStatus": "unaffected"}]}], "published": "2026-04-08T00:16:05.657", "references": [{"url": "https://aws.amazon.com/security/security-bulletins/2026-015-aws/", "tags": ["Vendor Advisory"], "source": "ff89ba41-3aa1-4d27-914a-91399e9639e5"}, {"url": "https://github.com/firecracker-microvm/firecracker/releases/tag/v1.14.4", "tags": ["Release Notes"], "source": "ff89ba41-3aa1-4d27-914a-91399e9639e5"}, {"url": "https://github.com/firecracker-microvm/firecracker/releases/tag/v1.15.1", "tags": ["Release Notes"], "source": "ff89ba41-3aa1-4d27-914a-91399e9639e5"}, {"url": "https://github.com/firecracker-microvm/firecracker/security/advisories/GHSA-776c-mpj7-jm3r", "tags": ["Vendor Advisory"], "source": "ff89ba41-3aa1-4d27-914a-91399e9639e5"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "description": [{"lang": "en", "value": "CWE-369"}, {"lang": "en", "value": "CWE-787"}]}], "descriptions": [{"lang": "en", "value": "An out-of-bounds write issue in the virtio PCI transport in Firecracker 1.13.0 through 1.14.3 and 1.15.0 on x86_64 and aarch64 might allow a local guest user with root privileges to crash the Firecracker VMM process or potentially execute arbitrary code on the host via modification of virtio queue configuration registers after device activation. Achieving code execution on the host requires additional preconditions, such as the use of a custom guest kernel or specific snapshot configurations.\n\nTo remediate this, users should upgrade to Firecracker 1.14.4 or 1.15.1 and later."}, {"lang": "es", "value": "Un problema de escritura fuera de l\u00edmites en el transporte PCI de virtio en Amazon Firecracker 1.13.0 hasta 1.14.3 y 1.15.0 en x86_64 y aarch64 podr\u00eda permitir a un usuario invitado local con privilegios de root bloquear el proceso VMM de Firecracker o potencialmente ejecutar c\u00f3digo arbitrario en el host mediante la modificaci\u00f3n de los registros de configuraci\u00f3n de la cola virtio despu\u00e9s de la activaci\u00f3n del dispositivo. Lograr la ejecuci\u00f3n de c\u00f3digo en el host requiere precondiciones adicionales, como el uso de un kernel invitado personalizado o configuraciones de instant\u00e1neas espec\u00edficas.\n\nPara remediar esto, los usuarios deben actualizar a Firecracker 1.14.4 o 1.15.1 y versiones posteriores."}], "lastModified": "2026-07-24T09:10:00.153", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:amazon:firecracker:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4662887D-1027-4734-9918-3E477F871CC8", "versionEndIncluding": "1.14.3", "versionStartIncluding": "1.13.0"}, {"criteria": "cpe:2.3:a:amazon:firecracker:1.15.0:-:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B5F6B773-4741-4E73-9DFD-9AA3F640A224"}, {"criteria": "cpe:2.3:a:amazon:firecracker:1.15.0:dev:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D90FD91D-C30F-40F4-8138-9D1A3EA496D9"}], "operator": "OR"}]}], "sourceIdentifier": "ff89ba41-3aa1-4d27-914a-91399e9639e5"}