{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-04-20T15:35:41.257","vulnerabilities":[{"cve":{"id":"CVE-2025-59529","sourceIdentifier":"security-advisories@github.com","published":"2025-12-18T21:15:53.637","lastModified":"2026-01-16T16:50:20.183","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"Avahi is a system which facilitates service discovery on a local network via the mDNS/DNS-SD protocol suite. In versions up to and including 0.9-rc2, the simple protocol server ignores the documented client limit and accepts unlimited connections, allowing for easy local DoS. Although `CLIENTS_MAX` is defined, `server_work()` unconditionally `accept()`s and `client_new()` always appends the new client and increments `n_clients`. There is no check against the limit. When client cannot be accepted as a result of maximal socket number of avahi-daemon, it logs unconditionally error per each connection. Unprivileged local users can exhaust daemon memory and file descriptors, causing a denial of service system-wide for mDNS/DNS-SD. Exhausting local file descriptors causes increased system load caused by logging errors of each of request. Overloading prevents glibc calls using nss-mdns plugins to resolve `*.local.` names and link-local addresses. As of time of publication, no known patched versions are available, but a candidate fix is available in pull request 808, and some workarounds are available. Simple clients are offered for nss-mdns package functionality. It is not possible to disable the unix socket `/run/avahi-daemon/socket`, but resolution requests received via DBus are not affected directly. Tools avahi-resolve, avahi-resolve-address and avahi-resolve-host-name are not affected, they use DBus interface. It is possible to change permissions of unix socket after avahi-daemon is started. But avahi-daemon does not provide any configuration for it. Additional access restrictions like SELinux can also prevent unwanted tools to access the socket and keep resolution working for trusted users."}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","baseScore":5.5,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":3.6}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-400"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:avahi:avahi:*:*:*:*:*:*:*:*","versionEndExcluding":"0.9","matchCriteriaId":"6481267F-934F-4A0C-9B25-59738E798458"},{"vulnerable":true,"criteria":"cpe:2.3:a:avahi:avahi:0.9:rc1:*:*:*:*:*:*","matchCriteriaId":"76971590-AEED-4CB1-B7B7-45EA8FD11524"}]}]}],"references":[{"url":"https://github.com/avahi/avahi/pull/808","source":"security-advisories@github.com","tags":["Issue Tracking","Patch"]},{"url":"https://github.com/avahi/avahi/security/advisories/GHSA-73wf-3xmj-x82q","source":"security-advisories@github.com","tags":["Exploit","Vendor Advisory"]},{"url":"https://zeropath.com/blog/avahi-simple-protocol-server-dos-cve-2025-59529","source":"security-advisories@github.com","tags":["Third Party Advisory","Exploit"]},{"url":"http://www.openwall.com/lists/oss-security/2025/12/19/1","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Mailing List","Exploit"]}]}}]}