What’s Vulnerable › Vulnerabilities

CVE-2025-47868: Apache NuttX RTOS: tools/bdf-converter.: tools/bdf-converter: Fix loop termination condition.

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-06-16 · updated 2026-06-17
• Weakness: CWE-122

Description

Out-of-bounds Write resulting in possible Heap-based Buffer Overflow vulnerability was discovered in tools/bdf-converter font conversion utility that is part of Apache NuttX RTOS repository. This standalone program is optional and neither part of NuttX RTOS nor Applications runtime, but active bdf-converter users may be affected when this tool is exposed to external provided user data data (i.e. publicly available automation). This issue affects Apache NuttX: from 6.9 before 12.9.0. Users are recommended to upgrade to version 12.9.0, which fixes the issue.

Affected products

• Apache Software Foundation Apache NuttX RTOS: from 6.9 before 12.9.0 — fixed in 12.9.0

How to fix

Upgrade to a fixed version: Apache Software Foundation Apache NuttX RTOS 12.9.0. Check the vendor advisory for mitigations.

References

• https://github.com/apache/nuttx/pull/16000
• https://lists.apache.org/thread/p4o2lcqgspx3ws1n2p4wmoqbqow1w1pw
• http://www.openwall.com/lists/oss-security/2025/06/14/1

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