What is the CVSS score of CVE-2025-9817?

CVE-2025-9817 has a CVSS 3.1 base score of 7.8 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.0%.

Which versions of Wireshark are affected by CVE-2025-9817?

Organizations using SSH dissector crash in Wireshark 4.4.0 to 4.4.8 face notable risk from CVE-2025-9817, a null pointer dereference vulnerability rated CVSS 7.8.. A patch is available.

How to fix or mitigate CVE-2025-9817?

Within 30 days: Identify all affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Wireshark CVE-2025-9817

HIGH

NULL Pointer Dereference (CWE-476)

2025-09-03 cve@gitlab.com

Denial Of Service Null Pointer Dereference Red Hat Wireshark Suse

7.8

CVSS 3.1

CVSS VectorNVD

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Patch released

Apr 09, 2026 - 14:30 nvd

Patch available

Analysis Generated

Mar 28, 2026 - 19:10 vuln.today

CVE Published

Sep 03, 2025 - 08:15 nvd

HIGH 7.8

DescriptionNVD

SSH dissector crash in Wireshark 4.4.0 to 4.4.8 allows denial of service

AnalysisAI

SSH dissector crash in Wireshark 4.4.0 to 4.4.8 allows denial of service. Rated high severity (CVSS 7.8), this vulnerability is no authentication required, low attack complexity. No vendor patch available.

Technical ContextAI

This vulnerability is classified as NULL Pointer Dereference (CWE-476), which allows attackers to crash the application by dereferencing a null pointer. SSH dissector crash in Wireshark 4.4.0 to 4.4.8 allows denial of service Affected products include: Wireshark.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Check pointers before dereferencing. Use static analysis tools to detect null pointer paths.