CVE-2025-69261 WasmEdge integer wrap in MemoryInstance::getSpan()'s memory size check
An integer overflow in WasmEdge's memory access check allows attackers to trigger a segmentation fault, causing a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-69261?
CVE-2025-69261 is a medium-severity vulnerability in WasmEdge, published on 30 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-190
Which versions are affected by CVE-2025-69261?
It affects 1 product.
Products include Linuxfoundation Wasmedge.
How do I fix CVE-2025-69261?
Upgrade to a fixed version.
Is CVE-2025-69261 being exploited?
There is no known exploitation of CVE-2025-69261 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2025-69261, GHSA-89fm-8mr7-gg4m, UBUNTU-CVE-2025-69261.