Executive brief
Samsung Walrus, an open-source WebAssembly engine, is vulnerable to a flaw that can cause the application to crash. By providing a specially crafted WebAssembly module with deeply nested instructions, an attacker can trigger a system failure. This results in a denial of service, potentially disrupting operations or services that rely on this engine to execute code.
Technical details
A NULL pointer dereference (CWE-476) exists in the Samsung Walrus WebAssembly engine. The vulnerability is triggered during the parsing or execution of a crafted WebAssembly module that contains deeply nested instructions, which likely exhausts resources or fails to handle recursion depth correctly, resulting in a NULL pointer access. An attacker can achieve a denial of service (DoS) by convincing a user or system to process the malicious module. The issue was addressed in pull request #409, which improved error handling and resource limits.
Affected products
- Samsung Walrus f339b8ee4ea701772e8ae640b3d1b12ac02b1ae9
Timeline
- 2026-04-28: patched: Fix merged in GitHub pull request #409
- 2026-05-19: disclosed: CVE published to NVD