CVE-2021-27186

high

Description

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.

References

https://github.com/fluent/fluent-bit/pull/3047

https://github.com/fluent/fluent-bit/pull/3045

https://github.com/fluent/fluent-bit/issues/3044

Details

Source: Mitre, NVD

Published: 2021-02-10

Updated: 2026-06-17

Risk Information

CVSS v2

Base Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

Severity: Medium

CVSS v3

Base Score: 7.5

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Severity: High

EPSS

EPSS: 0.00409