CVE-2025-69261: WasmEdge integer wrap in MemoryInstance::getSpan()'s memory size check

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-12-30 · updated 2026-06-17
Weakness: CWE-190

Description

WasmEdge is a WebAssembly runtime. Prior to version 0.16.0-alpha.3, a multiplication in `WasmEdge/include/runtime/instance/memory.h` can wrap, causing `checkAccessBound()` to incorrectly allow the access. This leads to a segmentation fault. Version 0.16.0-alpha.3 contains a patch for the issue.

Affected products

WasmEdge: before 0.16.0; 0.16.0-alpha1, 0.16.0-alpha2 — fixed in 0.16.0

How to fix

Upgrade to a fixed version: WasmEdge 0.16.0. Check the vendor advisory for mitigations.

References

https://github.com/WasmEdge/WasmEdge/commit/37cc9fa19bd23edbbdaa9252059b17f191fa4d17
https://github.com/WasmEdge/WasmEdge/security/advisories/GHSA-89fm-8mr7-gg4m

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