CVE-2020-18378 Information

Description

A NULL pointer dereference was discovered in SExpressionWasmBuilder::makeBlock in wasm/wasm-s-parser.c in Binaryen 1.38.26. A crafted wasm input can cause a segmentation fault leading to denial-of-service as demonstrated by wasm-as.

Reference

https://github.com/WebAssembly/binaryen/issues/1900