{"id":"CVE-2026-44216","revision":"ae19d712d1984776b246dbb0cfff04ce","records":[{"revision":"ae19d712d1984776b246dbb0cfff04ce","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-44216","aliases":[],"title":"Wasmtime: Panic when allocating a table exceeding the size of the host's address space","description":"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.","state":0,"publishedAt":"2026-05-14T14:54:32.975+00:00","modifiedAt":"2026-07-28T12:04:48.026+00:00","affected":[{"ecosystem":"Vendor product","name":"wasmtime","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"bytecodealliance\",\n                    \"product\": \"wasmtime\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 30.0.0, < 36.0.8\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 37.0.0, < 43.0.2\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"44.0.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"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","score":5.9,"severity":"MEDIUM"}],"references":["https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-p8xm-42r7-89xg"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-44216","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-44216","identifiers":["CVE-2026-44216"]},"retained":false,"historicalAffected":[]}],"coverage":[]}