CVE-2021-36088

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Source
https://cve.org/CVERecord?id=CVE-2021-36088
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-36088.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2021-36088
Aliases
Published
2021-07-01T03:15:08.847Z
Modified
2026-04-02T07:05:04.464071Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

Fluent Bit (aka fluent-bit) 1.7.0 through 1.7.4 has a double free in flbfree (called from flbparserjsondo and flbparserdo).

References

Affected packages

Git / github.com/fluent/fluent-bit

Affected ranges

Type
GIT
Repo
https://github.com/fluent/fluent-bit
Events
Introduced
1e8c00240903ebc71a9092313fd8b620e10632bc
Last affected
d638a11725ecdaf683be6167709c4712559cde79
Fixed
22346a74c07ceb90296be872be2d53eb92252a54
Database specific 
{
    "versions": [
        {
            "introduced": "1.7.0"
        },
        {
            "last_affected": "1.7.4"
        }
    ]
}

Affected versions

v1.*
v1.7.0
v1.7.1
v1.7.2
v1.7.3
v1.7.4

Database specific

vanir_signatures 
[
    {
        "signature_version": "v1",
        "source": "https://github.com/fluent/fluent-bit/commit/22346a74c07ceb90296be872be2d53eb92252a54",
        "signature_type": "Function",
        "deprecated": false,
        "digest": {
            "function_hash": "210821138041969896772177572225236899808",
            "length": 3135.0
        },
        "id": "CVE-2021-36088-499d5e79",
        "target": {
            "function": "flb_parser_json_do",
            "file": "src/flb_parser_json.c"
        }
    },
    {
        "signature_version": "v1",
        "source": "https://github.com/fluent/fluent-bit/commit/22346a74c07ceb90296be872be2d53eb92252a54",
        "signature_type": "Line",
        "deprecated": false,
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "15907375869919561542890800455146713837",
                "131867673044224448459384144928554040927",
                "335748199596119996638886818829781370693",
                "278957610952940763889198036630583526137",
                "87820120863783867503610716601233301250",
                "254993689099306520172863457632602922762",
                "327121976266765979669537015380649424712",
                "170524752924377180888809407919478188063"
            ]
        },
        "id": "CVE-2021-36088-9b9fd8dd",
        "target": {
            "file": "src/flb_parser_json.c"
        }
    }
]
source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-36088.json"