Quick answers
- Is CVE-2026-47307 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-47307 being exploited in the wild.
- How severe is CVE-2026-47307?
- Medium severity, with a CVSS score of 5.5, published 19 May 2026.
- Which products and versions are affected?
- Samsung Walrus f339b8ee4ea701772e8ae640b3d1b12ac02b1ae9.
- Is there a fix for CVE-2026-47307?
- A patch was published on 2026-04-28: Fix merged in GitHub pull request #409 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-47307 attacked?
- It is attacked with local access, in a software library.
- Am I affected by CVE-2026-47307?
- Check whether you run Samsung Walrus at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
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