CVE-2021-36088

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Source
https://nvd.nist.gov/vuln/detail/CVE-2021-36088
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-36088.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2021-36088
Aliases
Published
2021-07-01T03:15:08Z
Modified
2025-09-19T13:06:54.427672Z
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
0 Unknown introduced commit / All previous commits are affected
Fixed
22346a74c07ceb90296be872be2d53eb92252a54

Affected versions

0.*

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-0.5
0.13-dev-0.6
0.13-dev-0.7
0.13-dev-0.8
0.13-dev-0.9

v0.*

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.*

v1.0.0
v1.1.0
v1.2.0
v1.3.0
v1.4.0
v1.5.0
v1.6.0
v1.7.0
v1.7.0-rc1
v1.7.0-rc2
v1.7.0-rc3
v1.7.0-rc4
v1.7.0-rc5
v1.7.0-rc6
v1.7.0-rc7
v1.7.0-rc8
v1.7.0-rc9

Database specific 

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