CVE-2026-24116: Out-of-bounds Read

Wasmtime is a runtime for WebAssembly. Starting in version 29.0.0 and prior to version 36.0.5, 40.0.3, and 41.0.1, on x86-64 platforms with AVX, Wasmtime's compilation of the f64.copysign WebAssembly instruction with Cranelift may load 8 more bytes than is necessary. When signals-based-traps are...

WasmTime buffer error vulnerability

Wasmtime is a lightweight WebAssembly runtime open source by the Bytecode Alliance. Versions of Wastime prior to 29.0.0, 36.0.5, 40.0.3, and 41.0.1 contained a buffer error vulnerability. This vulnerability arises due to Cranelift’s compilation of f64.copysign WebAssembly instructions on x86-64...

Linux Distros Unpatched Vulnerability : CVE-2026-24116

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Wasmtime is a runtime for WebAssembly. Starting in version 29.0.0 and prior to version 36.0.5, 40.0.3, and 41.0.1, on x86-64 platforms with AVX, Wasmtime's...

Wasmtime segfault or unused out-of-sandbox load with `f64.copysign` operator on x86-64

This is an entry in the RustSec database for the Wasmtime security advisory located at https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-vc8c-j3xm-xj73 For more information see the GitHub-hosted security advisory...

RUSTSEC-2026-0006 Wasmtime segfault or unused out-of-sandbox load with `f64.copysign` operator on x86-64

This is an entry in the RustSec database for the Wasmtime security advisory located at https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-vc8c-j3xm-xj73 For more information see the GitHub-hosted security advisory...

CVE-2022-23636

Wasmtime is an open source runtime for WebAssembly & WASI. Prior to versions 0.34.1 and 0.33.1, there exists a bug in the pooling instance allocator in Wasmtime's runtime where a failure to instantiate an instance for a module that defines an externref global will result in an invalid drop of a...

CVE-2022-31146

Wasmtime is a standalone runtime for WebAssembly. There is a bug in the Wasmtime's code generator, Cranelift, where functions using reference types may be incorrectly missing metadata required for runtime garbage collection. This means that if a GC happens at runtime then the GC pass will...

CVE-2022-31169

Wasmtime is a standalone runtime for WebAssembly. There is a bug in Wasmtime's code generator, Cranelift, for AArch64 targets where constant divisors can result in incorrect division results at runtime. This affects Wasmtime prior to version 0.38.2 and Cranelift prior to 0.85.2. This issue only...

PT-2026-4857

Name of the Vulnerable Software and Affected Versions Wasmtime versions prior to 36.0.5 Wasmtime versions 36.0.5 through 40.0.2 Wasmtime versions 40.0.3 through 41.0.0 Wasmtime versions 41.0.1 Description A flaw in Wasmtime's Cranelift compiler can lead to a host-level segmentation fault when...

PT-2026-21805

Name of the Vulnerable Software and Affected Versions Wasmtime versions prior to 24.0.6 Wasmtime versions prior to 36.0.6 Wasmtime versions prior to 40.0.4 Wasmtime versions prior to 41.0.4 Wasmtime versions prior to 42.0.0 Description Wasmtime's implementation of WASI host interfaces is...

PT-2026-21806

Name of the Vulnerable Software and Affected Versions Wasmtime versions prior to 24.0.6 Wasmtime versions prior to 36.0.6 Wasmtime version 4.0.04 Wasmtime versions prior to 41.0.4 Wasmtime versions prior to 42.0.0 Description Wasmtime's implementation of the wasi:http/types.fields resource is...

Linux Distros Unpatched Vulnerability : CVE-2025-64345

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Wasmtime is a runtime for WebAssembly. Prior to version 38.0.4, 37.0.3, 36.0.3, and 24.0.5, Wasmtime's Rust embedder API contains an unsound interaction where a...

CVE-2025-64345

Wasmtime is a runtime for WebAssembly. Prior to version 38.0.4, 37.0.3, 36.0.3, and 24.0.5, Wasmtime's Rust embedder API contains an unsound interaction where a WebAssembly shared linear memory could be viewed as a type which provides safe access to the host Rust to the contents of the linear...

UBUNTU-CVE-2025-64345

Wasmtime is a runtime for WebAssembly. Prior to version 38.0.4, 37.0.3, 36.0.3, and 24.0.5, Wasmtime's Rust embedder API contains an unsound interaction where a WebAssembly shared linear memory could be viewed as a type which provides safe access to the host Rust to the contents of the linear...

GHSA-HC7M-R6V8-HG9Q Wasmtime provides unsound API access to a WebAssembly shared linear memory

Impact Wasmtime's Rust embedder API contains an unsound interaction where a WebAssembly shared linear memory could be viewed as a type which provides safe access to the host Rust to the contents of the linear memory. This is not sound for shared linear memories, which could be modified in paralle...

Wasmtime provides unsound API access to a WebAssembly shared linear memory

Impact Wasmtime's Rust embedder API contains an unsound interaction where a WebAssembly shared linear memory could be viewed as a type which provides safe access to the host Rust to the contents of the linear memory. This is not sound for shared linear memories, which could be modified in paralle...

CVE-2025-64345

Wasmtime is a runtime for WebAssembly. Prior to version 38.0.4, 37.0.3, 36.0.3, and 24.0.5, Wasmtime's Rust embedder API contains an unsound interaction where a WebAssembly shared linear memory could be viewed as a type which provides safe access to the host Rust to the contents of the linear...

EUVD-2025-131930

Wasmtime is a runtime for WebAssembly. Prior to version 38.0.4, 37.0.3, 36.0.3, and 24.0.5, Wasmtime's Rust embedder API contains an unsound interaction where a WebAssembly shared linear memory could be viewed as a type which provides safe access to the host Rust to the contents of the linear...

CVE-2025-64345 Wasmtime provides unsound API access to a WebAssembly shared linear memory

Wasmtime is a runtime for WebAssembly. Prior to version 38.0.4, 37.0.3, 36.0.3, and 24.0.5, Wasmtime's Rust embedder API contains an unsound interaction where a WebAssembly shared linear memory could be viewed as a type which provides safe access to the host Rust to the contents of the linear...

CVE-2025-64345 Wasmtime provides unsound API access to a WebAssembly shared linear memory

Wasmtime is a runtime for WebAssembly. Prior to version 38.0.4, 37.0.3, 36.0.3, and 24.0.5, Wasmtime's Rust embedder API contains an unsound interaction where a WebAssembly shared linear memory could be viewed as a type which provides safe access to the host Rust to the contents of the linear...