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Wireshark CVE-2026-15167

| EUVDEUVD-2026-42415 MEDIUM
Stack-based Buffer Overflow (CWE-121)
2026-07-08 cve@gitlab.com GHSA-qx92-wm5h-2pg7
Buffer Overflow Denial Of Service Stack Overflow Wireshark Red Hat Suse
5.5
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
5.5 MEDIUM
AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
vuln.today AI
7.5 HIGH

Availability-only crash with no demonstrated code execution despite the stack-overflow class; network-capturable input keeps AV:N/PR:N, though realistic file-open vector would justify UI:R.

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

Primary rating from NVD.

CVSS VectorNVD

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

Lifecycle Timeline

4
Severity Changed
Jul 09, 2026 - 20:07 NVD
HIGH MEDIUM
CVSS changed
Jul 09, 2026 - 20:07 NVD
7.5 (HIGH) 5.5 (MEDIUM)
Patch available
Jul 08, 2026 - 22:04 EUVD
Analysis Generated
Jul 08, 2026 - 21:35 vuln.today

DescriptionNVD

DBS Etherwatch file parser 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's DBS Etherwatch dissector affects release branches 4.6.0 through 4.6.6 and 4.4.0 through 4.4.16, where a malformed capture file or crafted packet can crash the application. The flaw is a stack-based buffer overflow (CWE-121) that manifests only as an availability impact - no confidentiality or integrity loss and no confirmed code execution - carrying a 7.5 (High) CVSS. No public exploit identified at time of analysis and the CVE is not listed in CISA KEV.

Technical ContextAI

Wireshark is a widely used open-source network protocol analyzer that decodes captured traffic through a large collection of dissectors. The affected component is the DBS Etherwatch dissector, which parses DEC/Digital Etherwatch capture data. The root cause is classified as CWE-121 (Stack-based Buffer Overflow): the parser writes beyond a fixed-size stack buffer while processing malformed DBS Etherwatch input, corrupting the stack and crashing the process. Vendor tags (Buffer Overflow, Stack Overflow, Denial Of Service) confirm the overflow class, but the CVSS impact metrics (C:N/I:N/A:H) indicate the observed effect is a crash rather than exploitable memory corruption leading to code execution. No CPE strings were supplied in the input; affected products are drawn from the description's version ranges.

RemediationAI

Patch available per vendor advisory (wnpa-sec-2026-62): upgrade to the fixed maintenance release on your branch - Wireshark's standard practice is to fix such issues in the next point release above the affected range (i.e., the 4.6.x release after 4.6.6 and the 4.4.x release after 4.4.16), but the exact fixed version numbers are not stated in the provided input and should be confirmed at https://www.wireshark.org/security/wnpa-sec-2026-62.html before deployment. As a compensating control until patched, avoid opening untrusted capture files and disable the DBS Etherwatch dissector via Analyze > Enabled Protocols (uncheck the protocol), which prevents the vulnerable parser from running at the cost of not decoding that niche protocol. When live-capturing on untrusted networks, restrict capture to needed protocols or use a build with the dissector disabled. Review the upstream fix at https://gitlab.com/wireshark/wireshark/-/work_items/21352 for verification.

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Same weakness CWE-121 – Stack-based Buffer Overflow

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Same technique Buffer Overflow

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Vendor StatusVendor

SUSE

Severity: Important
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-2026-15167 vulnerability details – vuln.today
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