CVE-2026-47307

Runtime crash via continued parsing after error

Published May 19, 2026 · Updated May 19, 2026

NULL pointer dereference in Samsung Open Source Walrus allows attackers to crash the runtime with deeply nested WebAssembly instructions. BinaryReaderDelegateWalrus callbacks returned success after the external parser delegate recorded a resource-limit error, so parsing continued with incomplete state until a null object was dereferenced. Exploitation requires a local user to cause Walrus to process a crafted module; the reported consequence is a runtime crash without confidentiality or integrity impact.

CVSS severity7.5
High
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in Samsung Open Source Walrus allows attackers to crash the runtime with deeply nested WebAssembly instructions. BinaryReaderDelegateWalrus callbacks returned success after the external parser delegate recorded a resource-limit error, so parsing continued with incomplete state until a null object was dereferenced. Exploitation requires a local user to cause Walrus to process a crafted module; the reported consequence is a runtime crash without confidentiality or integrity impact.

The record

CVE
CVE-2026-47307
Published
May 19, 2026
Updated
May 19, 2026
Vendor
Samsung Electronics Co., Ltd.
Product
Walrus
Classifications
CWE-476, CAPEC-230, T1499.004
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 19, 2026CVE publishedPublication date reported by the CVE source.
  2. May 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=f339b8ee4ea701772e8ae640b3d1b12ac02b1ae9

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Samsung Electronics Co., Ltd. · Walrusversion=f339b8ee4ea701772e8ae640b3d1b12ac02b1ae9

Published CVSS scores

7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.5Samsung TV & ApplianceCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
CAPEC-230Serialized Data with Nested Payloads
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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