Buffer overflow in Apache Nuttx
CVE-2025-47868
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.007 (52.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 52.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.007 · change: +0.001
Affected products
Weakness classification (CWE)
References
- github.com/apache/nuttx/pull/16000 (Third Party Advisory, patch, Issue Tracking)
- lists.apache.org/thread/p4o2lcqgspx3ws1n2p4wmoqbqow1w1pw (vendor-advisory, Vendor Advisory)
- af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Vendor Advisory)
Frequently asked questions
- What is CVE-2025-47868?
- CVE-2025-47868 is a critical-severity vulnerability in Apache Nuttx, classified under Heap-based Buffer Overflow. CVSS score: 9.8/10. Published 2025-06-16.
- How severe is CVE-2025-47868?
- Critical severity. CVSS v3 base score is 9.8 out of 10.