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Wireshark CVE-2026-15163

| EUVDEUVD-2026-42411 HIGH
Loop with Unreachable Exit Condition (Infinite Loop) (CWE-835)
2026-07-08 cve@gitlab.com GHSA-3qvj-9wrj-3gpm
Denial Of Service Wireshark
7.5
CVSS 3.1 · NVD
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Severity by source

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

Crafted packets reach the dissector without auth or interaction (AV:N/AC:L/PR:N/UI:N); impact is limited to a crash/hang so C:N/I:N/A:H.

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

Primary rating from NVD.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

7
Analysis Updated
Jul 09, 2026 - 20:18 vuln.today
v3 (cvss_changed)
Analysis Updated
Jul 09, 2026 - 20:17 vuln.today
v2 (cvss_changed)
Re-analysis Queued
Jul 09, 2026 - 20:07 vuln.today
cvss_changed
Severity Changed
Jul 09, 2026 - 20:07 NVD
MEDIUM HIGH
CVSS changed
Jul 09, 2026 - 20:07 NVD
5.5 (MEDIUM) 7.5 (HIGH)
Analysis Generated
Jul 08, 2026 - 22:09 vuln.today
Patch available
Jul 08, 2026 - 22:04 EUVD

DescriptionNVD

Multiple protocol dissector infinite loops in Wireshark 4.6.0 to 4.6.6 and 4.4.0 to 4.4.16 allow denial of service

AnalysisAI

Denial of service in Wireshark 4.6.0-4.6.6 and 4.4.0-4.4.16 lets a remote attacker crash or hang the application by feeding it crafted packets that trigger infinite loops in multiple protocol dissectors. No public exploit is identified at time of analysis, and the flaw is limited to availability - no code execution or data exposure. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Craft malformed protocol packet
Delivery
Deliver via live capture or .pcap file
Exploit
Wireshark invokes vulnerable dissector
Execution
Dissector enters infinite loop
Impact
Application hangs (denial of service)
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Vulnerability AssessmentAI

Exploitation Exploitation requires that Wireshark actually dissect attacker-influenced data using one of the affected protocol dissectors (tracked in GitLab work items 21275, 21277, 21330, 21383) - either by capturing crafted packets live or by the analyst opening a malicious capture file. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H, score 7.5) reflects a network-reachable, unauthenticated, low-complexity attack whose entire impact is availability - no confidentiality or integrity loss. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker crafts a malformed packet for one of the affected protocols and either injects it onto a network segment an analyst is actively capturing, or sends a booby-trapped .pcap/.pcapng file for the analyst to open. When Wireshark dissects the packet, the vulnerable dissector enters an infinite loop and the application hangs, denying the analyst use of the tool. …
Remediation Vendor-released patch: upgrade to Wireshark 4.6.7 (for the 4.6.x branch) or 4.4.17 (for the 4.4.x branch) as described in advisory wnpa-sec-2026-61 (https://www.wireshark.org/security/wnpa-sec-2026-61.html). … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours: Identify all systems running Wireshark 4.4.0-4.4.16 or 4.6.0-4.6.6, particularly in security operations or network monitoring roles. …

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Same weakness CWE-835 – Loop with Unreachable Exit Condition (Infinite Loop)

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CVE-2026-15163 vulnerability details – vuln.today
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