CVE-2023-41880

Wasmtime is a standalone runtime for WebAssembly. Wasmtime versions from 10.0.0 to versions 10.02, 11.0.2, and 12.0.1 contain a miscompilation of the WebAssembly i64x2.shrs instruction on x8664 platforms when the shift amount is a constant value that is larger than 32. Only x8664 is affected so a...

Design/Logic Flaw

Wasmtime is a standalone runtime for WebAssembly. Wasmtime versions from 10.0.0 to versions 10.02, 11.0.2, and 12.0.1 contain a miscompilation of the WebAssembly i64x2.shrs instruction on x8664 platforms when the shift amount is a constant value that is larger than 32. Only x8664 is affected so a...

CVE-2023-41880

CVE-2023-41880 affects Wasmtime on x86_64 where a miscompilation of the WebAssembly i64x2.shr_s instruction occurs for constant shift amounts greater than 32. Versions 10.0.0 through 10.0.2, 11.0.2, and 12.0.1 contain the issue; patch versions 10.0.2, 11.0.2, and 12.0.2 fix it (11.0.2 and 12.0.2 ...

CVE-2023-41880 Miscompilation of wasm `i64x2.shr_s` instruction with constant input on x86_64

Wasmtime is a standalone runtime for WebAssembly. Wasmtime versions from 10.0.0 to versions 10.02, 11.0.2, and 12.0.1 contain a miscompilation of the WebAssembly i64x2.shrs instruction on x8664 platforms when the shift amount is a constant value that is larger than 32. Only x8664 is affected so a...

Miscompilation of wasm `i64x2.shr_s` instruction with constant input on x86_64

Impact Wasmtime versions from 10.0.0 to 12.0.1 contain a miscompilation of the WebAssembly i64x2.shrs instruction on x8664 platforms when the shift amount is a constant value that is larger than 32. Only x8664 is affected so all other targets are not affected by this. The miscompilation results i...

wasmtime is a fast and secure runtime for WebAssembly. Wasmtime's code generation backend Cranelift has a bug on x86_64 platforms for the WebAssembly `i8x16.select` instruction which will produce the wrong results when the same operand is provided to the instruction and some of the selected indices are greater than 16. There is an off-by-one error in the calculation of the mask to the `pshufb` instruction which causes incorrect results to be returned if lanes are selected from the second vector. This codegen bug has been fixed in Wasmtiem 6.0.1 5.0.1 and 4.0.1. Users are recommended to upgrade to these updated versions. If upgrading is not an option for you at this time you can avoid this miscompilation by disabling the Wasm simd proposal. Additionally the bug is only present on x86_64 hosts. Other platforms such as AArch64 and s390x are not affected.

...

GHSA-XM67-587Q-R2VW wasmtime vulnerable to miscompilation of `i8x16.select` with the same inputs on x86_64

Impact Wasmtime's code generation backend, Cranelift, has a bug on x8664 platforms for the WebAssembly i8x16.select instruction which will produce the wrong results when the same operand is provided to the instruction and some of the selected indices are greater than 16. There is an off-by-one...

Code injection

wasmtime is a fast and secure runtime for WebAssembly. Wasmtime's code generation backend, Cranelift, has a bug on x8664 platforms for the WebAssembly i8x16.select instruction which will produce the wrong results when the same operand is provided to the instruction and some of the selected indice...

CVE-2023-27477

wasmtime is a fast and secure runtime for WebAssembly. Wasmtime's code generation backend, Cranelift, has a bug on x8664 platforms for the WebAssembly i8x16.select instruction which will produce the wrong results when the same operand is provided to the instruction and some of the selected indice...

CVE-2023-27477

Wasmtime Cranelift on x86_64 has a codegen bug for i8x16.select that can yield incorrect results when the same operand is used and some selected indices exceed 16. The off-by-one error in the mask calculation for pshufb may cause wrong results when lanes are taken from the second vector. This iss...

Miscompilation of `i8x16.swizzle` and `select` with v128 inputs

Impact Wasmtime's implementation of the SIMD proposal for WebAssembly on x8664 contained two distinct bugs in the instruction lowerings implemented in Cranelift. The aarch64 implementation of the simd proposal is not affected. The bugs were presented in the i8x16.swizzle and select WebAssembly...

CVE-2022-31104

Wasmtime is a standalone runtime for WebAssembly. In affected versions wasmtime's implementation of the SIMD proposal for WebAssembly on x8664 contained two distinct bugs in the instruction lowerings implemented in Cranelift. The aarch64 implementation of the simd proposal is not affected. The bu...

Input validation

Wasmtime is a standalone runtime for WebAssembly. In affected versions wasmtime's implementation of the SIMD proposal for WebAssembly on x8664 contained two distinct bugs in the instruction lowerings implemented in Cranelift. The aarch64 implementation of the simd proposal is not affected. The bu...

CVE-2022-31104 Miscompilation of `i8x16.swizzle` and `select` with v128 inputs in Wasmtime

Wasmtime is a standalone runtime for WebAssembly. In affected versions wasmtime's implementation of the SIMD proposal for WebAssembly on x8664 contained two distinct bugs in the instruction lowerings implemented in Cranelift. The aarch64 implementation of the simd proposal is not affected. The bu...

CVE-2022-31104 Miscompilation of `i8x16.swizzle` and `select` with v128 inputs in Wasmtime

Wasmtime is a standalone runtime for WebAssembly. In affected versions wasmtime's implementation of the SIMD proposal for WebAssembly on x8664 contained two distinct bugs in the instruction lowerings implemented in Cranelift. The aarch64 implementation of the simd proposal is not affected. The bu...