CVE-2025-58749CWE-190CWE-822

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

Low · published September 16, 2025

CVSS v4.0
2.1
EPSS
0%
Percentile
29.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
2.1 · LOW
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
EPSS
0.00369 · 29.6th percentile
Weaknesses
CWE-190 · Integer Overflow or Wraparound; CWE-822 · Untrusted Pointer Dereference
Published
2025-09-16T15:53Z
EPSS history
Timeline
  • 16 SEP 15:53Z
    WAMR runtime hangs or crashes with large memory.fill addresses in LLVM-JIT mode
    cvelistv5