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Wireshark CVE-2026-76924

| EUVDEUVD-2026-63159 MEDIUM
Out-of-bounds Read (CWE-125)
2026-08-19 GitLab GHSA-hmwq-56x2-72w7
Information Disclosure Buffer Overflow Denial Of Service Wireshark Red Hat Suse
5.5
CVSS 3.1 · Vendor: GitLab
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Severity by source

Vendor (GitLab) PRIMARY
5.5 MEDIUM
AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
vuln.today AI
5.5 MEDIUM

AV:L because a crafted file must be opened locally; UI:R for mandatory user action; C:N since only a crash, not data disclosure, is confirmed by vendor data.

3.1 AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
4.0 AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
SUSE
MEDIUM
qualitative
Red Hat
5.5 MEDIUM
qualitative

Primary rating from Vendor (GitLab).

CVSS VectorVendor: GitLab

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

2
Patch available
Aug 20, 2026 - 01:01 EUVD
Analysis Generated
Aug 19, 2026 - 23:26 vuln.today

DescriptionCVE.org

Kerberos protocol dissector crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service

AnalysisAI

Wireshark's Kerberos protocol dissector in versions 4.4.0-4.4.18 and 4.6.0-4.6.7 contains an out-of-bounds read (CWE-125) that crashes the application when parsing a maliciously crafted packet capture file, causing denial of service. Exploitation requires a local user to actively open the crafted file, making this a user-interaction-dependent, local-vector attack with no confidentiality or integrity impact. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Craft malformed Kerberos pcap file
Delivery
Deliver file to analyst via email or file share
Exploit
Victim opens file in affected Wireshark version
Execution
Kerberos dissector triggers out-of-bounds read
Impact
Wireshark process crashes
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Vulnerability AssessmentAI

Exploitation Exploitation requires a user running an affected Wireshark version (4.4.0-4.4.18 or 4.6.0-4.6.7) to open a specially crafted packet capture file containing malformed Kerberos protocol data - the Kerberos dissector must be active (enabled by default) and the file must be parsed during the session. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 3.1 score of 5.5 (Medium) accurately reflects a constrained threat model: AV:L means the attacker cannot trigger the crash over the network without the victim first saving and opening a crafted capture file, and UI:R further requires active user participation. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker crafts a malformed Kerberos protocol packet capture file (.pcap or .pcapng) and delivers it to a network analyst via email attachment, a shared file repository, or a compromised packet capture source. When the analyst opens the file in an affected Wireshark version, the Kerberos dissector performs an out-of-bounds read and the application crashes, interrupting the analyst's workflow. …
Remediation Upgrade Wireshark to a version beyond the affected ranges; consult the vendor security advisory at https://www.wireshark.org/security/wnpa-sec-2026-78.html for the confirmed fixed release, as an exact patched version number is not independently confirmed from the provided data (patch available per vendor advisory). … Detailed patch versions, workarounds, and compensating controls in full report.
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Same weakness CWE-125 – Out-of-bounds Read

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Same technique Information Disclosure

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CVE-2019-2725 CRITICAL POC
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CVE-2013-2251 CRITICAL POC
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CVE-2017-5638 CRITICAL POC
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CVE-2025-24813 CRITICAL POC
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CVE-2015-1701 HIGH POC
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CVE-2017-0147 HIGH POC
7.5
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8.8

Vendor StatusVendor

SUSE

Severity: Moderate
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise High Performance Computing 12 Affected
SUSE Linux Enterprise High Performance Computing 15 SP7 Affected
SUSE Linux Enterprise Module for Basesystem 15 SP7 Affected
SUSE Linux Enterprise Module for Desktop Applications 15 SP7 Affected

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CVE-2026-76924 vulnerability details – vuln.today
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