CVE-2026-34933

Avahi is a system which facilitates service discovery on a local network via the mDNS/DNS-SD protocol suite. Prior to version 0.9-rc4, any unprivileged local user can crash avahi-daemon by sending a single D-Bus method call with conflicting publish flags. This issue has been patched in version 0.9-rc4.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/avahi/avahi/commit/625ca0fac19229f6dfa3a6c6b698ae657187e50c	Patch
https://github.com/avahi/avahi/pull/891	Issue Tracking Patch
https://github.com/avahi/avahi/security/advisories/GHSA-w65r-6gxh-vhvc	Exploit Patch Vendor Advisory
http://www.openwall.com/lists/oss-security/2026/04/11/9	Exploit Mailing List Third Party Advisory
https://github.com/avahi/avahi/security/advisories/GHSA-w65r-6gxh-vhvc	Exploit Patch Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:avahi:avahi::::::::
	cpe:2.3:a:avahi:avahi:0.9:rc1::::::
	cpe:2.3:a:avahi:avahi:0.9:rc2::::::
	cpe:2.3:a:avahi:avahi:0.9:rc3::::::

History

No history.

Information

Published : 2026-04-03 23:17

Updated : 2026-07-24 22:10

NVD link : CVE-2026-34933

Mitre link : CVE-2026-34933

CVE.ORG link : CVE-2026-34933

JSON object : View

Products Affected

avahi

avahi

CWE

CWE-617

Reachable Assertion

{"id": "CVE-2026-34933", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-34933", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-04-06T16:09:17.006482Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "avahi", "product": "avahi", "versions": [{"status": "affected", "version": "< 0.9-rc4"}]}]}], "published": "2026-04-03T23:17:05.377", "references": [{"url": "https://github.com/avahi/avahi/commit/625ca0fac19229f6dfa3a6c6b698ae657187e50c", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/avahi/avahi/pull/891", "tags": ["Issue Tracking", "Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/avahi/avahi/security/advisories/GHSA-w65r-6gxh-vhvc", "tags": ["Exploit", "Patch", "Vendor Advisory"], "source": "security-advisories@github.com"}, {"url": "http://www.openwall.com/lists/oss-security/2026/04/11/9", "tags": ["Exploit", "Mailing List", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://github.com/avahi/avahi/security/advisories/GHSA-w65r-6gxh-vhvc", "tags": ["Exploit", "Patch", "Vendor Advisory"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-617"}]}], "descriptions": [{"lang": "en", "value": "Avahi is a system which facilitates service discovery on a local network via the mDNS/DNS-SD protocol suite. Prior to version 0.9-rc4, any unprivileged local user can crash avahi-daemon by sending a single D-Bus method call with conflicting publish flags. This issue has been patched in version 0.9-rc4."}, {"lang": "es", "value": "Avahi es un sistema que facilita el descubrimiento de servicios en una red local a trav\u00e9s del conjunto de protocolos mDNS/DNS-SD. Antes de la versi\u00f3n 0.9-rc4, cualquier usuario local sin privilegios puede bloquear avahi-daemon al enviar una \u00fanica llamada a m\u00e9todo D-Bus con indicadores de publicaci\u00f3n en conflicto. Este problema ha sido parcheado en la versi\u00f3n 0.9-rc4."}], "lastModified": "2026-07-24T22:10:00.140", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:avahi:avahi:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "6481267F-934F-4A0C-9B25-59738E798458", "versionEndExcluding": "0.9"}, {"criteria": "cpe:2.3:a:avahi:avahi:0.9:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "76971590-AEED-4CB1-B7B7-45EA8FD11524"}, {"criteria": "cpe:2.3:a:avahi:avahi:0.9:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "83D94AE4-46AC-4955-BB0D-193CF79149A1"}, {"criteria": "cpe:2.3:a:avahi:avahi:0.9:rc3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "42B0E12E-E0CC-47B5-B7D3-9FF12156B68E"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}