{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-44216", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-05-05T15:13:47.572Z", "datePublished": "2026-05-14T14:54:32.975Z", "dateUpdated": "2026-07-28T12:04:48.026Z" }, "containers": { "cna": { "title": "Wasmtime: Panic when allocating a table exceeding the size of the host's address space", "problemTypes": [ { "descriptions": [ { "cweId": "CWE-770", "lang": "en", "description": "CWE-770: Allocation of Resources Without Limits or Throttling", "type": "CWE" } ] } ], "metrics": [ { "cvssV4_0": { "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 5.9, "baseSeverity": "MEDIUM", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N", "version": "4.0" } } ], "references": [ { "name": "https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-p8xm-42r7-89xg", "tags": [ "x_refsource_CONFIRM" ], "url": "https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-p8xm-42r7-89xg" } ], "affected": [ { "vendor": "bytecodealliance", "product": "wasmtime", "versions": [ { "version": ">= 30.0.0, < 36.0.8", "status": "affected" }, { "version": ">= 37.0.0, < 43.0.2", "status": "affected" }, { "version": "44.0.0", "status": "affected" } ] } ], "providerMetadata": { "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-05-14T14:54:32.975Z" }, "descriptions": [ { "lang": "en", "value": "Wasmtime is a runtime for WebAssembly. From 30.0.0 to 36.0.8, 43.0.2, and 44.0.1, Wasmtime's allocation logic for a WebAssembly table contained checked arithmetic which panicked on overflow. This overflow is possible to trigger, and thus panic, when a table with an extremely large size is allocated. This is possible with the WebAssembly memory64 proposal where tables can have sizes in the 64-bit range as opposed to the previous 32-bit range which would not overflow. The panic happens when attempting to create a very large table, such as when instantiating a WebAssembly module or component. This vulnerability is fixed in 36.0.8, 43.0.2, and 44.0.1." } ], "source": { "advisory": "GHSA-p8xm-42r7-89xg", "discovery": "UNKNOWN" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2026-05-15T19:08:36.553275Z", "id": "CVE-2026-44216", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-15T19:09:21.141Z" } }, { "affected": [ { "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": [ "cpe:/a:redhat:hummingbird:1" ], "defaultStatus": "affected", "packageName": "rust-main", "product": "Red Hat Hardened Images", "vendor": "Red Hat", "versions": [ { "lessThan": "*", "status": "unaffected", "version": "1.97.1-2.hum1", "versionType": "rpm" } ] }, { "collectionURL": "https://access.redhat.com/downloads/content/package-browser/", "cpes": [ "cpe:/o:redhat:enterprise_linux:10" ], "defaultStatus": "unaffected", "packageName": "virt-firmware-rs", "product": "Red Hat Enterprise Linux 10", "vendor": "Red Hat" } ], "datePublic": "2026-05-14T14:54:32.975Z", "descriptions": [ { "lang": "en", "value": "A flaw was found in Wasmtime, a runtime for WebAssembly. A remote attacker could exploit an arithmetic overflow vulnerability by instantiating a WebAssembly module or component that attempts to allocate an extremely large table using the WebAssembly memory64 proposal. This flaw causes Wasmtime to panic, resulting in a Denial of Service (DoS) for the affected system." } ], "metrics": [ { "other": { "content": { "namespace": "https://access.redhat.com/security/updates/classification/", "value": "Important" }, "type": "Red Hat severity rating" } }, { "cvssV3_1": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1" }, "format": "CVSS" } ], "problemTypes": [ { "descriptions": [ { "cweId": "CWE-190", "description": "Integer Overflow or Wraparound", "lang": "en", "type": "CWE" } ] } ], "references": [ { "tags": [ "vdb-entry", "x_refsource_REDHAT" ], "url": "https://access.redhat.com/security/cve/CVE-2026-44216" }, { "name": "RHBZ#2477467", "tags": [ "issue-tracking", "x_refsource_REDHAT" ], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2477467" }, { "tags": [ "x_sadp-csaf-vex" ], "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44216.json" }, { "tags": [ "vendor-advisory", "x_refsource_REDHAT" ], "url": "https://access.redhat.com/errata/RHSA-2026:45341" } ], "solutions": [ { "lang": "en", "value": "RHSA-2026:45341: Red Hat Hardened Images" } ], "timeline": [ { "lang": "en", "time": "2026-05-14T16:01:38.636Z", "value": "Reported to Red Hat." }, { "lang": "en", "time": "2026-05-14T14:54:32.975Z", "value": "Made public." } ], "title": "wasmtime: Wasmtime: Denial of Service via large WebAssembly table allocation", "x_adpType": "supplier", "x_generator": { "engine": "sadp-cli 1.0.0" }, "providerMetadata": { "orgId": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "shortName": "redhat-SADP", "dateUpdated": "2026-07-28T12:04:48.026Z" } } ] } }