CVE-2025-58749

Name: CVE-2025-58749
Creator: NVD / NIST
Published: 2025-09-16T16:15:42.43+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 2.1/10EPSS 0.34%

Last modified Jun 17, 2026

CVE-2025-58749 is a low-severity vulnerability rated 2.1/10 on the CVSS scale. 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). EPSS estimates a 0.34% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

5.3/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CVSS 4.0

2.1/10

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.34%

26.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Bytecodealliance	Webassembly Micro Runtime	< 2.4.2

References

https://github.com/bytecodealliance/wasm-micro-runtime/commit/95f506a6e77d3ac7588eac7263f95558edfa7f3bPatch
https://github.com/bytecodealliance/wasm-micro-runtime/security/advisories/GHSA-xj5p-r8jq-pw47Exploit, Third Party Advisory
https://github.com/bytecodealliance/wasm-micro-runtime/security/advisories/GHSA-xj5p-r8jq-pw47Exploit, Third Party Advisory

Timeline

Published: Sep 16, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-58749?

How severe is CVE-2025-58749?

CVE-2025-58749 has a CVSS score of 2.1/10 (LOW severity). The EPSS model estimates a 0.34% probability of exploitation in the next 30 days.

How do I fix CVE-2025-58749?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-58749?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST