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Wireshark EUVDEUVD-2026-63145

| CVE-2026-76889 MEDIUM
Heap-based Buffer Overflow (CWE-122)
2026-08-19 GitLab GHSA-gjp8-9g86-732v
Heap Overflow Denial Of Service Buffer Overflow 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 confirmed by file-open or live-capture delivery requirement; no authentication needed; AC:H reflects need for precisely crafted UMTS FP payload; impact is crash-only (A:H), no C or I.

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 - 23:21 vuln.today
Patch available
Aug 19, 2026 - 23:04 EUVD
CVE Published
Aug 19, 2026 - 22:35 cve.org
MEDIUM 4.7

DescriptionCVE.org

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

AnalysisAI

Heap-based buffer overflow in Wireshark's UMTS FP protocol dissector crashes the application across affected 4.4.x and 4.6.x releases, enabling denial of service against network analysts and security teams. Wireshark versions 4.4.0 through 4.4.17 and 4.6.0 through 4.6.7 are vulnerable when a user opens a specially crafted capture file or captures live traffic containing a malformed UMTS FP frame. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Craft malformed UMTS FP capture file
Delivery
Deliver file to analyst via social engineering or shared storage
Exploit
Analyst opens file in vulnerable Wireshark
Execution
Heap-based buffer overflow triggered in UMTS FP dissector
Impact
Wireshark process crashes
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Vulnerability AssessmentAI

Exploitation Exploitation requires the target to run a vulnerable Wireshark version (4.4.0-4.4.17 or 4.6.0-4.6.7) with the UMTS FP dissector enabled, which is the default configuration. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 3.1 base score of 4.7 (Medium) reflects a significantly constrained attack surface: AV:L mandates local or file-system-level access, AC:H reflects the precision required to craft a triggering payload, and UI:R requires the victim to actively open a malicious file or capture the malformed traffic. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker crafts a packet capture file (.pcap or .pcapng) containing a malformed UMTS FP frame engineered to trigger the heap buffer overflow in the dissector. The file is delivered to a network analyst via a shared drive, email attachment, or a malicious download, and when the analyst opens it in a vulnerable Wireshark version, the dissector crashes the application. …
Remediation The primary fix is to upgrade Wireshark to version 4.6.8 (for the 4.6.x branch) or 4.4.18 (for the 4.4.x branch), identified as patched releases per EUVD-2026-63145 and the Wireshark Foundation vendor advisory wnpa-sec-2026-66 (https://www.wireshark.org/security/wnpa-sec-2026-66.html); the upstream issue tracker entry at https://gitlab.com/wireshark/wireshark/-/work_items/21413 contains additional fix detail. … Detailed patch versions, workarounds, and compensating controls in full report.
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Same weakness CWE-122 – Heap-based Buffer Overflow

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Same technique Heap Overflow

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7.8
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7.8
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8.4

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-2026-63145 vulnerability details – vuln.today
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