{"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":"2026-04-10T04:31:28.430590Z","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":"0"},{"last_affected":"804f2af1002b9608a8a2994233583eaf22ad45ba"}],"database_specific":{"versions":[{"introduced":"0"},{"last_affected":"1.6.10"}]}}],"versions":["0.13-dev-0.10","0.13-dev-0.11","0.13-dev-0.12","0.13-dev-0.13","0.13-dev-0.14","0.13-dev-0.15","0.13-dev-0.16","0.13-dev-0.17","0.13-dev-0.18","0.13-dev-0.4","0.13-dev-0.9","v0.10.0","v0.11.0","v0.12.0","v0.12.1","v0.12.2","v0.12.3","v0.12.4","v0.13.0","v0.14.0","v0.3","v0.4","v0.5","v0.5.1","v0.6.0","v0.7.0","v0.8.0","v0.8.1","v0.8.2","v0.9.0","v1.0.0","v1.1.0","v1.2.0","v1.3.0","v1.4.0","v1.5.0","v1.6.0","v1.6.1","v1.6.10","v1.6.2","v1.6.3","v1.6.4","v1.6.5","v1.6.6","v1.6.7","v1.6.8","v1.6.9"],"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"}]}