CVE-2025-12970 CVE-2025-12970
An attacker can trigger a stack buffer overflow in Fluent Bit's Docker input plugin by providing a long container name, potentially leading to code execution or crashes.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-12970?
CVE-2025-12970 is a high-severity memory corruption vulnerability in FluentBit Fluent Bit, published on 24 Nov 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-120
Which versions are affected by CVE-2025-12970?
1 open source package ship an affected version, including fluent-bit. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
fluent-bit Bitnami | From 4.1.0 | 4.1.1 |
Products include Treasuredata Fluent Bit.
How do I fix CVE-2025-12970?
Upgrade fluent-bit to 4.1.1 or later.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2025-12970 being exploited?
There is no known exploitation of CVE-2025-12970 in the wild and no public exploit code.
Other vulnerabilities in FluentBit Fluent Bit
Sources
Also known as AZL-71074, AZL-71111, BIT-fluent-bit-2025-12970, GHSA-8rpx-2j25-w4rp.