CVE-2021-36088: treasuredata fluent_bit Double Free
CVSS: 9.8v3.1CriticalModified
Published 01-07-2021Last modified 04-08-2024
Vulnerability summary
CVE-2021-36088 is a critical (CVSS 9.8) Double Free vulnerability in treasuredata fluent_bit. EPSS estimates a 2.38% chance of exploitation in the next 30 days, higher than 83.6% of scored vulnerabilities. 1 public exploit is recorded.
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)EPSS score
2.38%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference
Timeline
- 01-07-2021PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
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).
CVSS metrics
3 scores · 2 sources · 2 versionsCritical 9.8Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSourcesAll 2 agree
- NVDNIST9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
High 7.5Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
2.38%
Chance of exploitation in the next 30 days
Percentile
84%
Versus all other CVEs
30-day change
0.00 pp
From 2.38% on 20-09-2026
20-09-202620-10-2026
EPSS score2.38%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundExploit Reference (bugs.chromium.org)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Treasuredata1 product
- fluent_bit≥ 1.7.0, ≤ 1.7.4
1 vendor · 1 product
References
4 links- github.com/google/oss-fuzz-vulns/blob/main/vulns/fluent-bit/OSV-2021-702.yamlThird Party Advisory
- github.com/fluent/fluent-bit/commit/22346a74c07ceb90296be872be2d53eb92252a54PatchThird Party Advisory