CVE-2025-58749 LOW

CVE-2025-58749: WAMR runtime hangs or crashes with large memory.fill addresses in LLVM-JIT mode

Vendor Bytecodealliance
Product wasm-micro-runtime
Weakness CWE-822
Published September 16, 2025
Last update September 16, 2025
View on NVD All CVEs

CVSS base score

2.1/10
Attack vector Local
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

What the vulnerability does

01Description

WebAssembly Micro Runtime (WAMR) is a lightweight standalone WebAssembly (Wasm) runtime. In WAMR versions prior to 2.4.2, when running in LLVM-JIT mode, the runtime cannot exit normally when executing WebAssembly programs containing a memory.fill instruction where the first operand (memory address pointer) is greater than or equal to 2147483648 bytes (2GiB). This causes the runtime to hang in release builds or crash in debug builds due to accessing an invalid pointer. The issue does not occur in FAST-JIT mode or other runtime tools. This has been fixed in version 2.4.2.

Key dates

02Disclosure timeline

September 16, 2025 CVE published
September 16, 2025 Record updated