Heap-based Buffer Overflow in Wireshark

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Summary

CVECVE-2026-5403
StatePUBLISHED
AssignerGitLab
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-01 00:16:24 UTC
Updated2026-05-01 00:16:24 UTC
DescriptionSBC codec crash in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service and possible code execution

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from [email protected]

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Problem Types: CWE-122 | CWE-122 CWE-122: Heap-based Buffer Overflow

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
3.1CNACVSS7.8HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Wireshark Foundation Wireshark affected 4.6.0 4.6.5 semver Not specified
CNA Wireshark Foundation Wireshark affected 4.4.0 4.4.15 semver Not specified

References

ReferenceSourceLinkTags
www.wireshark.org/security/wnpa-sec-2026-16.html [email protected] www.wireshark.org
gitlab.com/wireshark/wireshark/-/issues/21103 [email protected] gitlab.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Duc Anh Nguyen (en)

Additional Advisory Data

Solutions

CNA: Upgrade to version 4.6.5 or above

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