CVE-2026-45782

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{"affected": [{"affectedData": [{"product": "cloud-hypervisor", "vendor": "cloud-hypervisor", "versions": [{"status": "affected", "version": ">= 21.0, < 51.2"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Cloud Hypervisor is a Virtual Machine Monitor for Cloud workloads. From version 21.0 to before version 51.2, a guest can cause a use-after-free in the cloud-hypervisor process by submitting two virtio-block descriptor chains that reuse the same head_index while asynchronous block I/O is enabled (e.g. io_uring, aio). When the kernel completes the duplicate operation before the original, the completion path frees a bounce buffer that the kernel is still actively reading from or writing to, corrupting the freed memory. This issue has been patched in versions 51.2 and 52.0."}, {"lang": "es", "value": "Cloud Hypervisor es un Monitor de M\u00e1quina Virtual para cargas de trabajo en la nube. Desde la versi\u00f3n 21.0 hasta antes de la versi\u00f3n 51.2, un invitado puede causar un uso despu\u00e9s de liberaci\u00f3n en el proceso de cloud-hypervisor al enviar dos cadenas de descriptores virtio-block que reutilizan el mismo head_index mientras la E/S de bloque as\u00edncrona est\u00e1 habilitada (p. ej., io_uring, aio). Cuando el kernel completa la operaci\u00f3n duplicada antes que la original, la ruta de finalizaci\u00f3n libera un b\u00fafer de rebote del que el kernel todav\u00eda est\u00e1 leyendo o escribiendo activamente, corrompiendo la memoria liberada. Este problema ha sido parcheado en las versiones 51.2 y 52.0."}], "id": "CVE-2026-45782", "lastModified": "2026-07-23T09:10:00.113", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "LOCAL", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.9, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "HIGH", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "HIGH", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/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", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-45782", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-06-10T15:58:34.973878Z", "version": "2.0.3"}}]}, "published": "2026-06-10T00:16:53.267", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/cloud-hypervisor/cloud-hypervisor/commit/1314ac883c641f1045bbb06dec0de045a3894baa"}, {"source": "security-advisories@github.com", "url": "https://github.com/cloud-hypervisor/cloud-hypervisor/pull/8220"}, {"source": "security-advisories@github.com", "url": "https://github.com/cloud-hypervisor/cloud-hypervisor/releases/tag/v51.2"}, {"source": "security-advisories@github.com", "url": "https://github.com/cloud-hypervisor/cloud-hypervisor/releases/tag/v52.0"}, {"source": "security-advisories@github.com", "url": "https://github.com/cloud-hypervisor/cloud-hypervisor/security/advisories/GHSA-f47p-p25q-83rh"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

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