LOW 3.6 Microsoft
CVE-2025-29478
An issue in fluent-bit v.3.7.2 allows a local attacker to cause a denial of service via the cfl_list_size in cfl_list.h:165.
Microsoft Security Update 2026-Aug: An issue in fluent-bit v.3.7.2 allows a local attacker to cause a denial of service via the cfl_list_size in cfl_list.h:165.
Affected Products
- cbl2 fluent-bit 3.0.6-2 on CBL Mariner 2.0
- azl3 fluent-bit 3.1.9-4 on Azure Linux 3.0
- cbl2 fluent-bit 3.0.6-3 on CBL Mariner 2.0
- cbl2 fluent-bit 3.0.6-4 on CBL Mariner 2.0
- azl3 fluent-bit 3.1.10-2 on Azure Linux 3.0
- azl3 fluent-bit 3.1.10-4 on Azure Linux 3.0
- azl3 fluent-bit 3.1.10-6 on Azure Linux 3.0
- azl3 fluent-bit 3.1.9-5 on Azure Linux 3.0
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-29478
- https://nvd.nist.gov/vuln/detail/CVE-2025-29478
This low severity vulnerability with a CVSS score of 3.6 was published on 2026-08-06 via Microsoft. Affected: cbl2 fluent-bit 3.0.6-2 on CBL Mariner 2.0, azl3 fluent-bit 3.1.9-4 on Azure Linux 3.0, cbl2 fluent-bit 3.0.6-3 on CBL Mariner 2.0 and 5 more.
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