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Wireshark CVE-2026-15174

| EUVDEUVD-2026-42420 MEDIUM
Heap-based Buffer Overflow (CWE-122)
2026-07-08 cve@gitlab.com GHSA-x9cw-h8q8-q64c
Heap Overflow Denial Of Service Buffer Overflow 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 exploitation requires opening a locally-staged malicious file; UI:R since the victim must actively open it; A:H for process crash; C:N and I:N as no data is exposed or modified.

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

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

Lifecycle Timeline

2
Analysis Generated
Jul 08, 2026 - 22:18 vuln.today
Patch available
Jul 08, 2026 - 22:04 EUVD

DescriptionCVE.org

Catapult DCT2000 protocol dissector crash in Wireshark 4.6.0 to 4.6.6 and 4.4.0 to 4.4.16 allows denial of service

AnalysisAI

Denial of service in Wireshark 4.6.0-4.6.6 and 4.4.0-4.4.16 is caused by a heap-based buffer overflow in the Catapult DCT2000 protocol dissector, crashing the application when a crafted capture file is opened. The CVSS local attack vector (AV:L) and required user interaction (UI:R) constrain exploitation to scenarios where an analyst is socially engineered into opening a malicious capture file - no remote or unauthenticated network exploitation path exists. No public exploit identified at time of analysis, and the vulnerability is not listed in CISA KEV; vendor-released fixes are available in 4.6.7 and 4.4.17.

Technical ContextAI

Wireshark is a widely-used open-source network protocol analyzer supporting hundreds of dissectors. The Catapult DCT2000 dissector parses a proprietary telecom protocol format used in LTE and mobile network testing equipment. CWE-122 (Heap-based Buffer Overflow) indicates that the dissector writes past the end of a heap-allocated buffer when processing malformed DCT2000-encoded data, corrupting heap memory and causing an uncontrolled process crash. The CVSS vector AV:L/UI:R confirms this is a file-parsing vulnerability - Wireshark must actively open and dissect attacker-supplied DCT2000 content for the overflow to occur. The upstream issue is tracked at https://gitlab.com/wireshark/wireshark/-/work_items/21270.

RemediationAI

The primary fix is upgrading to Wireshark 4.6.7 (for the 4.6.x branch) or Wireshark 4.4.17 (for the 4.4.x branch) as documented in the vendor advisory at https://www.wireshark.org/security/wnpa-sec-2026-52.html. If immediate patching is not feasible, a targeted compensating control is to disable the Catapult DCT2000 dissector via Wireshark's protocol preferences (Analyze > Enabled Protocols > search 'DCT2000' > uncheck), which prevents the vulnerable code path from executing at the cost of losing DCT2000 dissection capability. Additionally, analysts should be instructed not to open DCT2000-format capture files received from untrusted external parties until the upgrade is applied. No patch version was independently confirmed beyond the EUVD-sourced affected version ranges - verify the exact release artifact against the official Wireshark download page before deploying.

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Same weakness CWE-122 – Heap-based Buffer Overflow

View all
CVE-2023-4911 HIGH POC
7.8
CVE-2023-27997 CRITICAL
9.8
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7.8
CVE-2026-53362 HIGH POC
7.8
CVE-2025-21418 HIGH
7.8
CVE-2023-23376 HIGH
7.8
CVE-2025-24993 HIGH
7.8
CVE-2024-30085 HIGH POC
7.8

Same technique Heap Overflow

View all
CVE-2023-4911 HIGH POC
7.8
CVE-2023-27997 CRITICAL
9.8
CVE-2025-5419 HIGH POC
8.8
CVE-2026-53362 HIGH POC
7.8
CVE-2025-21418 HIGH
7.8
CVE-2023-23376 HIGH
7.8
CVE-2024-30085 HIGH POC
7.8
CVE-2023-6246 HIGH POC
8.4

Vendor StatusVendor

SUSE

Severity: Moderate
Product Status
SUSE Linux Enterprise Desktop 15 SP7 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
SUSE Linux Enterprise Server 15 SP7 Affected

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CVE-2026-15174 vulnerability details – vuln.today
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