RUSTSEC-2026-0090

vendorUSosv

Use-after-free bug after cloning `wasmtime::Linker`

view advisory published 2026-04-09Licence: CC0-1.0

This is an entry in the RustSec database for the Wasmtime security advisory located at https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-hfr4-7c6c-48w2 For more information see the GitHub-hosted security advisory.

describes (1)

Related CVEs.

ID	severity	EPSS	exploitable	published
CVE-2026-34983US	medium5.0	0.12% (2nd)	—	2026-04-09
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.…

references

External citations — patches, advisories, analysis.

https://crates.io/crates/wasmtimePACKAGE
https://github.com/bytecodealliance/wasmtime/issues/12069REPORT
https://rustsec.org/advisories/RUSTSEC-2026-0090.htmlADVISORY

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