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

CVE-2025-9817

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

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

HIGH · CVSS 7.8 EPSS 0.00031
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-476NULL Pointer Dereference
▤

Affected Products & Versions

2
wireshark>= 4.4.0 and <= 4.4.8
wiresharkall versions
▣

Scoring & Timeline

7.8
HIGH · CVSS v3.1 · cve@gitlab.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD03 Sep 2025 · 08:15 AM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

7
suse-csafSUSE-SU-2026:1169-1
suse-csafopenSUSE-SU-2026:20151-1
suse-csafSUSE-SU-2026:20222-1
suse-csafSUSE-SU-2025:03294-1
suse-csafopenSUSE-SU-2025:15522-1
🔗

References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://gitlab.com/wireshark/wireshark/-/issues/20642Issue Tracking
https://www.wireshark.org/security/wnpa-sec-2025-03.htmlThird Party Advisory
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