{"id":"AZL-99093","summary":"CVE-2026-33630 affecting package fluent-bit 3.1.10-6","details":"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.","modified":"2026-09-04T14:17:10.875035853Z","published":"2026-09-03T19:17:27Z","upstream":["CVE-2026-33630"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33630"}],"affected":[{"package":{"name":"fluent-bit","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/fluent-bit"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"3.1.10-6"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-99093.json"}}],"schema_version":"1.9.0"}