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.
History

Wed, 17 Sep 2025 11:00:00 +0000

Type Values Removed Values Added
First Time appeared Bytecodealliance
Bytecodealliance webassembly Micro Runtime
Vendors & Products Bytecodealliance
Bytecodealliance webassembly Micro Runtime

Tue, 16 Sep 2025 17:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 16 Sep 2025 16:00:00 +0000

Type Values Removed Values Added
Description 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.
Title WAMR runtime hangs or crashes with large memory.fill addresses in LLVM-JIT mode
Weaknesses CWE-190
CWE-822
References
Metrics cvssV4_0

{'score': 2.1, '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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2025-09-16T15:53:35.345Z

Updated: 2025-09-16T16:12:35.589Z

Reserved: 2025-09-04T19:18:09.498Z

Link: CVE-2025-58749

cve-icon Vulnrichment

Updated: 2025-09-16T16:12:27.924Z

cve-icon NVD

Status : Received

Published: 2025-09-16T16:15:42.430

Modified: 2025-09-16T17:15:41.317

Link: CVE-2025-58749

cve-icon Redhat

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