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Wireshark EUVDEUVD-2026-63171

| CVE-2026-76920 MEDIUM
Out-of-bounds Write (CWE-787)
2026-08-19 GitLab GHSA-wpxj-7r5r-vw5w
Memory Corruption Buffer Overflow Denial Of Service Wireshark 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 file-open required with user interaction; no confidentiality or integrity impact; high complexity reflects specific malformed file conditions needed to trigger the crash.

3.1 AV:L/AC:H/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

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
Patch available
Aug 20, 2026 - 01:01 EUVD
Analysis Generated
Aug 19, 2026 - 23:27 vuln.today
CVE Published
Aug 19, 2026 - 22:45 cve.org
MEDIUM 4.7

DescriptionCVE.org

3gpp phone log file parser crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service

AnalysisAI

Denial of service in Wireshark's 3GPP phone log file parser affects versions 4.6.0-4.6.7 and 4.4.0-4.4.18, crashing the application when a specially crafted log file is opened. The root cause is CWE-787 (out-of-bounds write), consistent with a buffer overflow in the parser's memory handling. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Craft malformed 3GPP log file
Delivery
Deliver file to target analyst
Exploit
Analyst opens file in Wireshark
Execution
Parser triggers out-of-bounds write
Impact
Wireshark process crashes
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Vulnerability AssessmentAI

Exploitation Exploitation requires that a user running an affected Wireshark version (4.6.0-4.6.7 or 4.4.0-4.4.18) actively opens a crafted 3GPP phone log file - the 3GPP log file parser must be invoked, which only occurs when processing that specific file format. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.7 score reflects the genuine constraints on this vulnerability: local attack vector (AV:L), high complexity (AC:H), and mandatory user interaction (UI:R) all reduce exploitability significantly. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker crafts a malformed 3GPP phone log file designed to trigger the out-of-bounds write in Wireshark's parser, then delivers it to a target analyst via email, shared network storage, or a compromised capture source. When the analyst opens the file in an affected Wireshark version, the parser crashes, terminating the session and any in-progress capture analysis. …
Remediation Upgrade to a fixed release beyond 4.6.7 (4.6.x branch) or beyond 4.4.18 (4.4.x branch) per the Wireshark security advisory at https://www.wireshark.org/security/wnpa-sec-2026-81.html. … Detailed patch versions, workarounds, and compensating controls in full report.
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Same weakness CWE-787 – Out-of-bounds Write

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Same technique Memory Corruption

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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-2026-63171 vulnerability details – vuln.today
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