CVE-2025-9817

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

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://gitlab.com/wireshark/wireshark/-/issues/20642	Issue Tracking
https://www.wireshark.org/security/wnpa-sec-2025-03.html	Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:wireshark:wireshark::::::::
	cpe:2.3:a:wireshark:wireshark:4.4.9:rc0::::::

History

26 Sep 2026, 00:10

Type	Values Removed	Values Added
Summary		(es) Fallo del disector SSH en Wireshark 4.4.0 a 4.4.8 permite denegación de servicio

Information

Published : 2025-09-03 08:15

Updated : 2026-09-26 00:10

NVD link : CVE-2025-9817

Mitre link : CVE-2025-9817

CVE.ORG link : CVE-2025-9817

JSON object : View

Products Affected

wireshark

wireshark

CWE

CWE-476

NULL Pointer Dereference

{"id": "CVE-2025-9817", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-9817", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2025-09-04T03:55:18.280820Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "cve@gitlab.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "affected": [{"source": "cve@gitlab.com", "affectedData": [{"vendor": "Wireshark Foundation", "product": "Wireshark", "versions": [{"status": "affected", "version": "4.4.0", "lessThan": "4.4.9", "versionType": "semver"}], "defaultStatus": "unknown"}]}], "published": "2025-09-03T08:15:31.893", "references": [{"url": "https://gitlab.com/wireshark/wireshark/-/issues/20642", "tags": ["Issue Tracking"], "source": "cve@gitlab.com"}, {"url": "https://www.wireshark.org/security/wnpa-sec-2025-03.html", "tags": ["Third Party Advisory"], "source": "cve@gitlab.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "cve@gitlab.com", "description": [{"lang": "en", "value": "CWE-476"}]}], "descriptions": [{"lang": "en", "value": "SSH dissector crash in Wireshark 4.4.0 to 4.4.8 allows denial of service"}, {"lang": "es", "value": "Fallo del disector SSH en Wireshark 4.4.0 a 4.4.8 permite denegaci\u00f3n de servicio"}], "lastModified": "2026-09-26T00:10:00.127", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:wireshark:wireshark:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "DD2EDBB4-DEF2-457C-AB6E-D03E366211C8", "versionEndIncluding": "4.4.8", "versionStartIncluding": "4.4.0"}, {"criteria": "cpe:2.3:a:wireshark:wireshark:4.4.9:rc0:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B20A19B9-B63E-44BF-91F2-85EBE84F8AA7"}], "operator": "OR"}]}], "sourceIdentifier": "cve@gitlab.com"}