Runtime denial of service via wrapped bounds check
Published Sep 7, 2026 · Updated Sep 8, 2026
Integer overflow in Samsung Walrus ff3bf5ff5c4878f8e5572c9593d303f6bc997443 allows attackers to crash the runtime via a crafted WebAssembly module. Memory::init() adds two 32-bit unsigned source-bound values without detecting wraparound, allowing the resulting smaller value to pass its heap-bounds check. The attacker must cause a Walrus process to load the module; the disclosed consequence is confined to an out-of-bounds heap read and denial of service.
Summary
What happened
Integer overflow in Samsung Walrus ff3bf5ff5c4878f8e5572c9593d303f6bc997443 allows attackers to crash the runtime via a crafted WebAssembly module. Memory::init() adds two 32-bit unsigned source-bound values without detecting wraparound, allowing the resulting smaller value to pass its heap-bounds check. The attacker must cause a Walrus process to load the module; the disclosed consequence is confined to an out-of-bounds heap read and denial of service.
The record
- CVE
- CVE-2026-86314
- Published
- Sep 7, 2026
- Updated
- Sep 8, 2026
- Vendor
- Samsung Electronics Co., Ltd.
- Product
- Walrus
- Classifications
- CWE-190, CAPEC-92, T1499
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 7, 2026CVE publishedPublication date reported by the CVE source.
- Sep 8, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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- Affected versionversion=ff3bf5ff5c4878f8e5572c9593d303f6bc997443
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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