{"id":"EUVD-2026-21029","revision":"c8c46b468da040da95a4071397806800","records":[{"revision":"c8c46b468da040da95a4071397806800","observedAt":"2026-11-01T06:07:57.368+00:00","statement":{"source":"euvd","id":"EUVD-2026-21029","aliases":["CVE-2026-34983","GHSA-hfr4-7c6c-48w2"],"title":"Wasmtime is a runtime for WebAssembly. In 43.0.0, cloning a wasmtime::Linker is unsound and can result in use-after-free bugs. This bug is not controllable by guest Wasm programs. It can only be triggered by a specific sequence of embedder …","description":"Wasmtime is a runtime for WebAssembly. In 43.0.0, cloning a wasmtime::Linker is unsound and can result in use-after-free bugs. This bug is not controllable by guest Wasm programs. It can only be triggered by a specific sequence of embedder API calls made by the host. Specifically, the following steps must occur to trigger the bug clone a wasmtime::Linker, drop the original linker instance, use the new, cloned linker instance, resulting in a use-after-free. This vulnerability is fixed in 43.0.1.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 4.0","vector":"CVSS:4.0/AV:P/AC:H/AT:P/PR:H/UI:A/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N","score":1,"severity":null}],"references":["https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-hfr4-7c6c-48w2"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-21029","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Apr 9, 2026, 6:47:26 PM","dateUpdated":"Apr 13, 2026, 3:38:33 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-21029","identifiers":["EUVD-2026-21029","CVE-2026-34983","GHSA-hfr4-7c6c-48w2"]},"retained":false,"historicalAffected":[]}],"coverage":[]}