CVE-2021-38297

Exploiting CVE-2021-38297: Vulnerability in GO Wasm Buffer Overflow Overview of the Vulnerability WebAssembly WASM serves as a binary instruction format executable in most modern web browsers. It acts as a compilation target for various high-level languages like C, C++, Rust, and GO, allowing cod...

CVE-2026-21001-WebAssembly-Linear-Memory-OOB-via-Table-Index-Confusion

CVE-2026-21001 – WebAssembly Linear Memory OOB via Table Index Confusion Overview A WebAssembly module uses an imported function with no bounds check on an array index. An attacker can supply an out-of-bounds index to read or write outside the linear memory, potentially leaking host secrets or...

CVE-2021-38297-Go-wasm-Replication

🚨 Exploiting CVE-2021-38297: A Journey into GO Wasm Buffer Overflow 🚨 🌐 Overview of the Vulnerability 🌐 WebAssembly WASM 🌍, a cutting-edge binary instruction format, enables the seamless execution of high-level languages like C, C++, Rust, and GO in modern web browsers. However, the discovery of...

JLSEC-2026-1350 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...

JLSEC-2026-1362 Wasmtime has data leakage between pooling allocator instances

Impact Wasmtime's implementation of its pooling allocator contains a bug where in certain configurations the contents of linear memory can be leaked from one instance to the next. The implementation of resetting the virtual memory permissions for linear memory used the wrong predicate to determin...

EUVD-2026-21033

Wasmtime has data leakage between pooling allocator instances...

DEBIAN-CVE-2026-35186

Wasmtime is a runtime for WebAssembly. From 25.0.0 to before 36.0.7, 42.0.2, and 43.0.1, Wasmtime's Winch compiler backend contains a bug where translating the table.grow operator causes the result to be incorrectly typed. For 32-bit tables this means that the result of the operator, internally i...

CVE-2026-34988

Wasmtime is a runtime for WebAssembly. From 28.0.0 to before 36.0.7, 42.0.2, and 43.0.1, Wasmtime's implementation of its pooling allocator contains a bug where in certain configurations the contents of linear memory can be leaked from one instance to the next. The implementation of resetting the...

CVE-2026-34941

Wasmtime is a runtime for WebAssembly. Prior to 24.0.7, 36.0.7, 42.0.2, and 43.0.1, Wasmtime contains a vulnerability where when transcoding a UTF-16 string to the latin1+utf16 component-model encoding it would incorrectly validate the byte length of the input string when performing a bounds chec...

CVE-2026-34988

Wasmtime is a runtime for WebAssembly. From 28.0.0 to before 36.0.7, 42.0.2, and 43.0.1, Wasmtime's implementation of its pooling allocator contains a bug where in certain configurations the contents of linear memory can be leaked from one instance to the next. The implementation of resetting the...

CVE-2026-35186

Wasmtime is a runtime for WebAssembly. From 25.0.0 to before 36.0.7, 42.0.2, and 43.0.1, Wasmtime's Winch compiler backend contains a bug where translating the table.grow operator causes the result to be incorrectly typed. For 32-bit tables this means that the result of the operator, internally i...

CVE-2026-35186 Wasmtime has an improperly masked return value from `table.grow` with Winch compiler backend

Wasmtime is a runtime for WebAssembly. From 25.0.0 to before 36.0.7, 42.0.2, and 43.0.1, Wasmtime's Winch compiler backend contains a bug where translating the table.grow operator causes the result to be incorrectly typed. For 32-bit tables this means that the result of the operator, internally i...

CVE-2026-34988 Wasmtime leaks data between pooling allocator instances

Wasmtime is a runtime for WebAssembly. From 28.0.0 to before 36.0.7, 42.0.2, and 43.0.1, Wasmtime's implementation of its pooling allocator contains a bug where in certain configurations the contents of linear memory can be leaked from one instance to the next. The implementation of resetting the...

CVE-2026-34987

Wasmtime is a runtime for WebAssembly. From 25.0.0 to before 36.0.7, 42.0.2, and 43.0.1, Wasmtime with its Winch baseline non-default compiler backend may allow properly constructed guest Wasm to access host memory outside of its linear-memory sandbox. This vulnerability requires use of the Winch...

CVE-2026-34987: Out-of-bounds Read

Wasmtime is a runtime for WebAssembly. From 25.0.0 to before 36.0.7, 42.0.2, and 43.0.1, Wasmtime with its Winch baseline non-default compiler backend may allow properly constructed guest Wasm to access host memory outside of its linear-memory sandbox. This vulnerability requires use of the Winch...

PT-2026-31691

Name of the Vulnerable Software and Affected Versions Wasmtime versions 28.0.0 through 36.0.6, 42.0.2 and 43.0.1 Description Wasmtime's pooling allocator implementation contains a flaw where linear memory contents can leak between WebAssembly instances under specific configurations. This occurs d...

CVE-2026-34988: Improper Restriction of Operations within the Bounds of a Memory Buffer

Wasmtime is a runtime for WebAssembly. From 28.0.0 to before 36.0.7, 42.0.2, and 43.0.1, Wasmtime's implementation of its pooling allocator contains a bug where in certain configurations the contents of linear memory can be leaked from one instance to the next. The implementation of resetting the...

Astra Linux – Vulnerability in Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix crypto buffers in non-linear memory The crypto API, through the scatterlist API, expects input buffers to be in linear memory. We handle this by using the cifssgsetbuf helper function, which converts vmalloc’d...

EUVD-2025-201826

Wasmi is a WebAssembly interpreter focused on constrained and embedded systems. In versions 0.41.0, 0.41.1, 0.42.0 through 0.47.1, 0.50.0 through 0.51.2 and 1.0.0, Wasmi's linear memory implementation leads to a Use After Free vulnerability, triggered by a WebAssembly module under certain memory...

CVE-2025-66627 Wasmi's Linear Memory has a Critical Use After Free Vulnerability

Wasmi is a WebAssembly interpreter focused on constrained and embedded systems. In versions 0.41.0, 0.41.1, 0.42.0 through 0.47.1, 0.50.0 through 0.51.2 and 1.0.0, Wasmi's linear memory implementation leads to a Use After Free vulnerability, triggered by a WebAssembly module under certain memory...