# CVE-2025-6140: spdlog pattern_formatter-inl.h scoped_padder resource consumption

CVE-2025-6140 is fixed in spdlog on 1 platform, first by DEBIAN-CVE-2025-6140, released June 16, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2025-6140
- Priority: Routine
- CVSS: 3.3 (Moderate)
- EPSS: 0.0025
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jun 16, 2025
- Weakness: Uncontrolled Resource Consumption
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-6140

## Description

A vulnerability, which was classified as problematic, was found in spdlog up to 1.15.1. This affects the function scoped_padder in the library include/spdlog/pattern_formatter-inl.h. The manipulation leads to resource consumption. It is possible to launch the attack on the local host. The exploit has been disclosed to the public and may be used. Upgrading to version 1.15.2 is able to address this issue. The identifier of the patch is 10320184df1eb4638e253a34b1eb44ce78954094. It is recommended to upgrade the affected component.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | spdlog Debian 13.5 (trixie) | 1:1.15.2+ds-1 | [DEBIAN-CVE-2025-6140](https://patchblox.com/security/data/fix/linux/debian-cve-2025-6140.md) | Jun 16, 2025 |
| Linux | spdlog Debian 14 | 1:1.15.2+ds-1 | [DEBIAN-CVE-2025-6140](https://patchblox.com/security/data/fix/linux/debian-cve-2025-6140.md) | Jun 16, 2025 |

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