CVE-2023-27477 (cranelift-codegen, wasmtime) | allinfosecnews.com

March 8, 2023, 9:15 p.m. |

National Vulnerability Database web.nvd.nist.gov

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. …

backend bug code cve error fast platforms results runtime s code select webassembly

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