Heap-based Buffer Overflow in Wireshark

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Summary

CVECVE-2026-5402
StatePUBLISHED
AssignerGitLab
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-30 07:16:37 UTC
Updated2026-07-15 01:16:41 UTC
DescriptionTLS protocol dissector heap overflow in Wireshark 4.6.0 to 4.6.4 allows denial of service and possible code execution

Risk And Classification

Primary CVSS: v3.1 8.8 HIGH from ADP

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

EPSS: 0.003900000 probability, percentile 0.312540000 (date 2026-07-16)

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

VersionSourceTypeScoreSeverityVector
3.1ADPCVSS8.8HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
3.1[email protected]Secondary8.8HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
3.10b0ca135-0b70-47e7-9f44-1890c2a1c46cSecondary8.8HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
3.1CNACVSS8.8HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

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

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Wireshark Wireshark All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Wireshark Foundation Wireshark affected 4.6.0 4.6.5 semver Not specified
ADP Red Hat Red Hat Enterprise Linux 10 Not specified Not specified
ADP Red Hat Red Hat Enterprise Linux 6 Not specified Not specified
ADP Red Hat Red Hat Enterprise Linux 7 Not specified Not specified
ADP Red Hat Red Hat Enterprise Linux 8 Not specified Not specified
ADP Red Hat Red Hat Enterprise Linux 9 Not specified Not specified

References

ReferenceSourceLinkTags
www.wireshark.org/security/wnpa-sec-2026-14.html [email protected] www.wireshark.org Vendor Advisory
security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-5402.json 0b0ca135-0b70-47e7-9f44-1890c2a1c46c security.access.redhat.com
bugzilla.redhat.com/show_bug.cgi 0b0ca135-0b70-47e7-9f44-1890c2a1c46c bugzilla.redhat.com
gitlab.com/wireshark/wireshark/-/issues/21090 [email protected] gitlab.com Exploit, Issue Tracking
access.redhat.com/security/cve/CVE-2026-5402 0b0ca135-0b70-47e7-9f44-1890c2a1c46c access.redhat.com
gitlab.com/wireshark/wireshark/-/work_items/21090 MITRE 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

SourceTimeEvent
ADP2026-04-30T07:02:36.095ZReported to Red Hat.
ADP2026-04-30T05:39:14.217ZMade public.

Solutions

CNA: Upgrade to version 4.6.5 or above

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