Wasmtime: Cranelift backend on aarch64 can jump to incorrect target on large Wasm `br_table` instruction

影響: rust:wasmtime < 36.0.19 → 36.0.19, rust:wasmtime >= 37.0.0, < 48.0.7 → 48.0.7, rust:wasmtime >= 49.0.0, < 49.0.4 → 49.0.4

When running with the Cranelift compiler backend on an aarch64 target, Wasmtime can compile a Wasm module with more than ~256k targets on one br_table instruction in a way that results in an incorrect conditional branch target. This conditional branch could then jump to arbitrary other code (at an user-controlled offset), leading to arbitrary sandbox escapes. Impact Any Wasmtime engine running on aarch64 with default settings can be forced to jump to arbitrary code by a user-controlled Wasm mod…

GitHub Advisory Database에서 읽기

2026. 10. 29. 오전 06:14, GitHub Advisory Database에서 "Wasmtime: Cranelift backend on aarch64 can jump to incorrect target on large Wasm `br_table` instruction"을(를) 게시했습니다 (유형: 취약점 권고). 심각도는 "긴급"(critical)입니다. 관련 기술: Rust, Wasmtime / Wasmer. CVE: CVE-2026-115893.