Skip to main content

Wireshark CVE-2026-15170

| EUVDEUVD-2026-42413 MEDIUM
Heap-based Buffer Overflow (CWE-122)
2026-07-08 cve@gitlab.com GHSA-hfrj-29vh-pcf2
Buffer Overflow Denial Of Service Heap Overflow Red Hat Wireshark Suse
5.5
CVSS 3.1 · Vendor: gitlab
Share

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

Local vector and UI:R reflect file-delivery or live-capture attack path; no privileges needed; impact confined to Wireshark process availability only.

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:P/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 - 22:14 vuln.today
Patch available
Jul 08, 2026 - 22:04 EUVD

DescriptionCVE.org

Z39.50 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

Heap-based buffer overflow in Wireshark's Z39.50 protocol dissector crashes the application when processing malformed Z39.50 PDUs, resulting in denial of service. Affected versions span the 4.4.x branch (4.4.0-4.4.16) and 4.6.x branch (4.6.0-4.6.6). An attacker can trigger the crash by persuading an analyst to open a crafted packet capture file or by injecting malicious Z39.50 traffic onto a monitored network segment; no active exploitation (CISA KEV) or public exploit code has been identified at time of analysis.

Technical ContextAI

Wireshark is an open-source packet analyzer that includes dissectors for hundreds of protocols, including Z39.50 - an ISO 23950 information-retrieval protocol historically used by library catalog systems. CWE-122 (Heap-based Buffer Overflow) identifies the root cause: during parsing of a malformed Z39.50 PDU, the dissector writes beyond the bounds of a heap-allocated buffer, corrupting memory and crashing the process. The flaw affects two active release trains: 4.4.0 through 4.4.16 and 4.6.0 through 4.6.6, as confirmed by EUVD-2026-42413. Because this is a dissector-layer bug, it is triggered at the packet-parsing stage before any protocol state is established.

RemediationAI

Upgrade to Wireshark 4.4.17 or 4.6.7 as documented in vendor advisory wnpa-sec-2026-58 (https://www.wireshark.org/security/wnpa-sec-2026-58.html). As a compensating control prior to patching, disable the Z39.50 dissector via Analyze > Enabled Protocols in the Wireshark UI (or via -d z3950=false on the command line for TShark), which prevents parsing of Z39.50 traffic at the cost of losing visibility into that protocol. Additionally, avoid opening untrusted or externally-sourced packet capture files in unpatched installations, since the local attack vector means file delivery is the primary risk pathway.

More in Wireshark

View all
CVE-2014-2299 CRITICAL POC
9.3 Mar 11

Buffer overflow in the mpeg_read function in wiretap/mpeg.c in the MPEG parser in Wireshark 1.8.x before 1.8.13 and 1.10
CVE-2013-4074 MEDIUM POC
5.0 Jun 09

The dissect_capwap_data function in epan/dissectors/packet-capwap.c in the CAPWAP dissector in Wireshark 1.6.x before 1.
CVE-2018-6836 CRITICAL POC
9.8 Feb 08

The netmonrec_comment_destroy function in wiretap/netmon.c in Wireshark through 2.4.4 performs a free operation on an un
CVE-2014-4174 CRITICAL POC
9.3 Jun 18

wiretap/libpcap.c in the libpcap file parser in Wireshark 1.10.x before 1.10.4 allows remote attackers to execute arbitr
CVE-2017-9353 HIGH POC
7.5 Jun 02

In Wireshark 2.2.0 to 2.2.6, the IPv6 dissector could crash. Rated high severity (CVSS 7.5), this vulnerability is remot
CVE-2017-17085 HIGH POC
7.5 Dec 01

In Wireshark 2.4.0 to 2.4.2 and 2.2.0 to 2.2.10, the CIP Safety dissector could crash. Rated high severity (CVSS 7.5), t
CVE-2017-9347 HIGH POC
7.5 Jun 02

In Wireshark 2.2.0 to 2.2.6, the ROS dissector could crash with a NULL pointer dereference. Rated high severity (CVSS 7.
CVE-2025-5601 HIGH POC
7.8 Jun 04

A denial of service vulnerability in Column handling crashes in Wireshark 4.4.0 to 4.4.6 and 4.2.0 to 4.2.12 (CVSS 7.8)

CVE-2023-4513 HIGH POC
7.5 Aug 24

BT SDP dissector memory leak in Wireshark 4.0.0 to 4.0.7 and 3.6.0 to 3.6.15 allows denial of service via packet injecti
CVE-2023-4512 HIGH POC
7.5 Aug 24

CBOR dissector crash in Wireshark 4.0.0 to 4.0.6 allows denial of service via packet injection or crafted capture file.

CVE-2023-2879 HIGH POC
7.5 May 26

GDSDB infinite loop in Wireshark 4.0.0 to 4.0.5 and 3.6.0 to 3.6.13 allows denial of service via packet injection or cra
CVE-2023-1992 HIGH POC
7.5 Apr 12

RPCoRDMA dissector crash in Wireshark 4.0.0 to 4.0.4 and 3.6.0 to 3.6.12 allows denial of service via packet injection o

Same weakness CWE-122 – Heap-based Buffer Overflow

View all
CVE-2023-4911 HIGH POC
7.8
CVE-2023-27997 CRITICAL
9.8
CVE-2025-25249 CRITICAL POC
9.8
CVE-2026-85880 HIGH POC
7.8
CVE-2025-24985 HIGH POC
7.8
CVE-2026-53362 HIGH POC
7.8
CVE-2025-21418 HIGH
7.8
CVE-2023-23376 HIGH
7.8

Same technique Buffer Overflow

View all
CVE-2017-7269 CRITICAL POC
9.8
CVE-2015-5119 CRITICAL POC
9.8
CVE-2015-3113 CRITICAL POC
9.8
CVE-2011-2462 CRITICAL POC
9.8
CVE-2020-0796 CRITICAL POC
10.0
CVE-2019-11043 CRITICAL POC
9.8
CVE-2009-0927 HIGH POC
8.8
CVE-2012-1889 HIGH POC
8.8

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

Share

CVE-2026-15170 vulnerability details – vuln.today
Back

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy