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The panic happens when attempting to create a very large table, such as when instantiating a WebAssembly module or component.\n\nThis bug does not affect the pooling allocator which limits tables sizes to much less than the required amount to trigger the overflow. This bug is only present for the on-demand instance allocator, which is Wasmtime's default allocator. This bug also requires the `memory64` WebAssembly feature to be enabled, which is on-by-default.\n\nPanicking in the host process is considered a denial-of-service vector for Wasmtime.\n\n### Patches\n\nWasmtime 36.0.8, 43.0.2, and 44.0.1 have all been released which fixes this issue.\n\n### Workarounds\n\nEmbeddings can switch to using the pooling allocator to work around this issue, or the `memory64` WebAssembly proposal can be disabled. Otherwise there is no workaround and users are recommended to upgrade.","state":0,"publishedAt":"2026-05-07T00:08:59+00:00","modifiedAt":"2026-09-10T03:51:06.5979038+00:00","affected":[{"ecosystem":"crates.io","name":"wasmtime","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"30.0.0"},{"kind":"fixed","version":"36.0.8"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"crates.io","name":"wasmtime","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"37.0.0"},{"kind":"fixed","version":"43.0.2"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V4","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":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-p8xm-42r7-89xg","https://nvd.nist.gov/vuln/detail/CVE-2026-44216","https://github.com/bytecodealliance/wasmtime","https://rustsec.org/advisories/RUSTSEC-2026-0114.html"],"sourceUrl":"https://github.com/advisories/GHSA-p8xm-42r7-89xg","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-p8xm-42r7-89xg","identifiers":["GHSA-p8xm-42r7-89xg","CVE-2026-44216","RUSTSEC-2026-0114"]},"retained":false,"historicalAffected":[]},{"revision":"cfc193e30823460c894fb7f90d489288","observedAt":"2026-10-24T13:19:54.901+00:00","statement":{"source":"osv","id":"RUSTSEC-2026-0114","aliases":["CVE-2026-44216","GHSA-p8xm-42r7-89xg"],"title":"Panic when allocating a table exceeding the size of the host's address space","description":"This is an entry in the RustSec database for the Wasmtime security advisory\nlocated at\nhttps://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-p8xm-42r7-89xg\nFor more information see the GitHub-hosted security advisory.","state":0,"publishedAt":"2026-04-30T12:00:00+00:00","modifiedAt":"2026-10-12T18:00:08.3315259+00:00","affected":[{"ecosystem":"crates.io","name":"wasmtime","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"30.0.0"},{"kind":"fixed","version":"36.0.8"},{"kind":"introduced","version":"37.0.0"},{"kind":"fixed","version":"43.0.2"},{"kind":"introduced","version":"44.0.0"},{"kind":"fixed","version":"44.0.1"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V4","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":null,"severity":null}],"references":["https://crates.io/crates/wasmtime","https://rustsec.org/advisories/RUSTSEC-2026-0114.html","https://github.com/bytecodealliance/wasmtime/pull/13245"],"sourceUrl":"https://osv.dev/vulnerability/RUSTSEC-2026-0114","license":"OSV · upstream source license applies","key":"osv:RUSTSEC-2026-0114","identifiers":["RUSTSEC-2026-0114","CVE-2026-44216","GHSA-p8xm-42r7-89xg"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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