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TI-2025-36407 Aliases CVE-2025-58749

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

Priority MEDIUM 44CWE-190Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
—
Confidentiality · integrity · availability
None · None · Low
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00369 30th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed wasm-micro-runtime (bytecodealliance): 2.4.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
bytecodealliancewasm-micro-runtimebefore 2.4.22.4.2Patch availableCNA
  • wasm-micro-runtime Vendorbytecodealliance Affected before 2.4.2 Fixed in 2.4.2 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:bytecodealliance:webassembly_micro_runtime:*:*:*:*:*:*:*:*before 2.4.2Vulnerablebytecodealliance
  • cpe:2.3:a:bytecodealliance:webassembly_micro_runtime:*:*:*:*:*:*:*:* Versions before 2.4.2 Vulnerable ·bytecodealliance

Remediation

  • Fix · CNA wasm-micro-runtime (bytecodealliance) Fixed in 2.4.2

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-58749

References

Exploit 1

Patch 1

  • TI-2024-16741 An issue in bytecodealliance wasm-micro-runtime before v.b3f728c and fixed in commit… CVSS 3.1HIGH 8.8
  • TI-2024-22658 An out-of-bound memory read vulnerability was discovered in Bytecode Alliance… CVSS 3.1HIGH 7.5
  • TI-2024-18300 wasm-micro-runtime (aka WebAssembly Micro Runtime or WAMR) 06df58f is vulnerable to NULL… CVSS 3.1HIGH 7.5
  • TI-2023-26034 An heap overflow vulnerability was discovered in Bytecode alliance wasm-micro-runtime… CVSS 3.1HIGH 7.5
  • TI-2025-33969 WebAssembly Micro Runtime's `--addr-pool` option allows all IPv4 addresses when subnet mask is not specified CVSS 4.0MEDIUM 6.9
  • TI-2024-22657 A heap buffer overflow vulnerability was discovered in Bytecode Alliance… CVSS 3.1MEDIUM 6.2
See all 10 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences