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Vulnerabilities

Vulnerability · CVE-2025-12970

The extract_name function in Fluent Bit in_docker input plugin copies container names into a fixed size stack buffer without validating length.

Published Nov 24, 2025 · catalog updated Jan 7, 2026 · FluentBit Fluent Bit

Last checked Oct 30, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-12970. EPSS is 1.07%. Act only if a listed version of FluentBit Fluent Bit is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
High8.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
1.07%
Remediation
Version ranges on file
Affected products
vendor FluentBit Fluent Bit 0 <4.0.12

The extract_name function in Fluent Bit in_docker input plugin copies container names into a fixed size stack buffer without validating length. An attacker who can create containers or control container names, can supply a long name that overflows the buffer, leading to process crash or arbitrary code execution.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor FluentBit Fluent Bit 0 <4.0.120 <4.0.12

How to fix CVE-2025-12970

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-12970. EPSS is 1.07%. Act only if a listed version of FluentBit Fluent Bit is installed.

Which versions are affected?

Compare what you have installed with FluentBit Fluent Bit 0 <4.0.12 0 <4.0.12. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 1.07%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Docker security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Nov 24, 2025 · EUVD

    Detected

    The extract_name function in Fluent Bit in_docker input plugin copies container names into a fixed size stack buffer without validating length. An attacker who can create containers or control container names, can supply a long name that overflows the buffer, leading to process crash or arbitrary code execution.

  2. Jan 7, 2026 · EUVD

    Updated

    The extract_name function in Fluent Bit in_docker input plugin copies container names into a fixed size stack buffer without validating length. An attacker who can create containers or control container names, can supply a long name that overflows the buffer, leading to process crash or arbitrary code execution.

Sources

  • CVE.orgVulnerability recordCVE-2025-12970

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-12970

    30-day exploitation probability 1.07%

    first.org
  • EUVDVulnerability recordEUVD-2025-198809

    The extract_name function in Fluent Bit in_docker input plugin copies container names into a fixed size stack buffer without validating length. An attacker who can create containers or control container names, can supply a long name that overflows the buffer, leading to process c

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 30, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSOct 30, 2026
  • CVE.orgOct 27, 2026
  • EUVDOct 27, 2026
CVE-2025-12970: Fluent Bit CVSS 8.8 · ZeroDay Findings