ALPINE-CVE-2026-33630

ALPINE-CVE-2026-33630

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c-ares is an asynchronous resolver library. From ver 1.32.3 until 1.34.7, a use-after-free / double-free in c-ares' query-completion handling. The same flaw — a query's callback being invoked while the query is still linked in the channel's internal lookup structures — is present at multiple points in the resend/finish path (timeout handling, response handling, and query dispatch). If the query, or for ares_getaddrinfo() the owning host_query, is freed as a side effect of that callback, it is then accessed and/or freed a second time. This vulnerability is fixed in ver 1.34.7.

CVSS 7.5 · Élevée · Correctif disponible

Publication

2026-09-03T19:17:27.420Z

Mise à jour

2026-10-01T02:17:49.248933005Z

Pile logicielle: system

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