{"id":"CVE-2021-27186","details":"Fluent Bit 1.6.10 has a NULL pointer dereference when an flb_malloc return value is not validated by flb_avro.c or http_server/api/v1/metrics.c.","aliases":["BIT-fluent-bit-2021-27186"],"modified":"2026-07-08T21:26:20.583470Z","published":"2021-02-10T22:15:13.877Z","references":[{"type":"FIX","url":"https://github.com/fluent/fluent-bit/pull/3045"},{"type":"FIX","url":"https://github.com/fluent/fluent-bit/pull/3047"},{"type":"EVIDENCE","url":"https://github.com/fluent/fluent-bit/issues/3044"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/fluent/fluent-bit","events":[{"introduced":"804f2af1002b9608a8a2994233583eaf22ad45ba"},{"last_affected":"804f2af1002b9608a8a2994233583eaf22ad45ba"}],"database_specific":{"cpe":"cpe:2.3:a:treasuredata:fluent_bit:1.6.10:*:*:*:*:*:*:*","extracted_events":[{"introduced":"1.6.10"},{"last_affected":"1.6.10"}],"source":"CPE_STRING"}}],"versions":["1.6.10","v1.6.10"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-27186.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}