Fluent Bit (aka fluent-bit) 1.7.0 through 1.7.4 has a double free in flb_free (called from flb_parser_json_do and flb_parser_do)
Published Jul 1, 2021
9.8
CRITICALCVSS 3.1
EPSS 2.38%
Description
Fluent Bit (aka fluent-bit) 1.7.0 through 1.7.4 has a double free in flb_free (called from flb_parser_json_do and flb_parser_do).
Affected products
No data.
- ≥ 1.7.0 · ≤ 1.7.4
-
- Version 1.7.0StatusaffectedConstraints<=1.7.4
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Treasuredata | Fluent Bit | n/a |
|
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:P/I:P/A:P
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
YesTechnical Impact
TotalDecision
n/aAssessed May 23, 2024 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (17 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 2.38% (0.02384) | 83.34th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.38% (0.02384) | 81.68th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.36% (0.00364) | 56.30th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.51% (0.00511) | 77.39th | v3 (v2023.03.01) |
| Mar 16, 2024 | 0.51% (0.00511) | 76.10th | v3 (v2023.03.01) |
| Mar 8, 2024 | 0.46% (0.00463) | 74.87th | v3 (v2023.03.01) |
| Feb 4, 2024 | 0.46% (0.00463) | 72.86th | v3 (v2023.03.01) |
| Sep 22, 2023 | 0.38% (0.00381) | 69.76th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.29% (0.00295) | 64.39th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.02% (0.01018) | 40.69th | v2 (v2022.01.01) |
| Sep 10, 2022 | 1.02% (0.01018) | 38.88th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.02% (0.01018) | 36.86th | v2 (v2022.01.01) |
| Feb 4, 2022 | 15.35% (0.15351) | 91.59th | v2 (v2022.01.01) |
| Feb 3, 2022 | 4.50% (0.04504) | 76.47th | v1 |
| Jan 6, 2022 | 4.50% (0.04504) | 76.26th | v1 |
| Sep 1, 2021 | 1.04% (0.01040) | 64.49th | v1 |
| Jul 1, 2021 | 1.04% (0.01040) | 0.00th | v1 |
References (4)
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=33750 ExploitPatchThird Party Advisory
- https://github.com/fluent/fluent-bit/commit/22346a74c07ceb90296be872be2d53eb92252a54 PatchThird Party Advisory
- https://github.com/fluent/fluent-bit/pull/3453 PatchThird Party Advisory
- https://github.com/google/oss-fuzz-vulns/blob/main/vulns/fluent-bit/OSV-2021-702.yaml Third Party Advisory
| Link | Providers | Tags |
|---|---|---|
| https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=33750 | ExploitPatchThird Party Advisory | |
| https://github.com/fluent/fluent-bit/commit/22346a74c07ceb90296be872be2d53eb92252a54 | PatchThird Party Advisory | |
| https://github.com/fluent/fluent-bit/pull/3453 | PatchThird Party Advisory | |
| https://github.com/google/oss-fuzz-vulns/blob/main/vulns/fluent-bit/OSV-2021-702.yaml | Third Party Advisory |
Change history (0)
No recorded changes yet.