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Wireshark EUVDEUVD-2026-63138

| CVE-2026-76881 MEDIUM
NULL Pointer Dereference (CWE-476)
2026-08-19 GitLab GHSA-qqq4-v263-8jqw
Null Pointer Dereference Denial Of Service Wireshark Red Hat Suse
4.7
CVSS 3.1 · Vendor: GitLab
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Severity by source

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

Local vector because exploitation requires user interaction with a crafted file; AC:H for precise malformed CMS input; no confidentiality or integrity impact, only application crash.

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

Primary rating from Vendor (GitLab).

CVSS VectorVendor: GitLab

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

Lifecycle Timeline

3
Analysis Generated
Aug 19, 2026 - 23:25 vuln.today
Patch available
Aug 19, 2026 - 23:04 EUVD
CVE Published
Aug 19, 2026 - 22:34 cve.org
MEDIUM 4.7

DescriptionCVE.org

CMS 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 CMS protocol dissector crashes via a null pointer dereference (CWE-476) in versions 4.6.0 through 4.6.7 and 4.4.0 through 4.4.17, allowing denial of service against the application. An attacker can cause Wireshark to crash by inducing a user to open a malformed capture file or by injecting crafted CMS protocol traffic into a live capture session. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Craft malformed CMS protocol packet
Delivery
Deliver via file or live capture
Exploit
User opens capture in Wireshark
Execution
CMS dissector dereferences null pointer
Impact
Wireshark process crashes (DoS)
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Vulnerability AssessmentAI

Exploitation Exploitation requires that the target has an affected version of Wireshark (4.6.0-4.6.7 or 4.4.0-4.4.17) installed and locally accessible. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 3.1 base score of 4.7 (Medium) reflects the constrained attack surface: AV:L requires the attack to occur locally on the analyst's machine, AC:H indicates exploitation is not trivially reproducible, and UI:R means user interaction - such as opening a crafted pcap file or initiating a capture on a network carrying malicious CMS traffic - is required. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker crafts a malicious pcap or pcapng file containing a malformed CMS protocol message designed to trigger a null pointer dereference in Wireshark's CMS dissector. The attacker delivers the file to a security analyst - for example, by embedding it in a phishing email disguised as a suspicious capture to investigate - and the analyst opens the file in an affected Wireshark version, causing the application to crash. …
Remediation Upgrade Wireshark to version 4.6.8 or later (for the 4.6.x branch) or 4.4.18 or later (for the 4.4.x branch) per the vendor advisory at https://www.wireshark.org/security/wnpa-sec-2026-76.html. … Detailed patch versions, workarounds, and compensating controls in full report.
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Same weakness CWE-476 – NULL Pointer Dereference

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7.5
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Same technique Null Pointer Dereference

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CVE-2016-0742 HIGH
7.5
CVE-2014-3470 MEDIUM
4.3
CVE-2017-3730 HIGH POC
7.5
CVE-2017-3169 CRITICAL POC
9.8
CVE-2016-4957 HIGH
7.5
CVE-2015-3194 HIGH
7.5
CVE-2026-21525 MEDIUM
6.2
CVE-2017-0016 MEDIUM
5.9

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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EUVD-2026-63138 vulnerability details – vuln.today
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