Apache NuttX RTOS: tools/bdf-converter.: tools/bdf-converter: Fix loop termination condition.
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-122 and the CVSS impact.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
- Fix · CNA Apache NuttX RTOS: tools/bdf-converter. (Apache Software Foundation) Fixed in 12.9.0
Timeline
- 2026-10-02 Threatist record created from CVE-2025-47868
- 2026-10-03 Alias added: GHSA-fj9m-mxr3-fvf7
References
More Apache Nuttx vulnerabilities
- TI-2025-24548 Apache NuttX RTOS: NuttX Bluetooth Stack HCI and UART DoS/RCE Vulnerabilities. CVSS 3.1CRITICAL 9.8
- TI-2025-30293 Apache NuttX RTOS: examples/xmlrpc: Fix calls buffers size. CVSS 3.1CRITICAL 9.8
- TI-2021-08260 malloc, realloc and memalign implementations are vulnerable to integer wrap-arounds CVSS 3.1CRITICAL 9.8
- TI-2020-13277 Apache NuttX (incubating) Out of Bound Write from invalid fragmentation offset value specified in the IP header CVSS 3.1CRITICAL 9.8
- TI-2020-01863 NULL pointer dereference in Apache NuttX CVSS 3.1CRITICAL 9.8
- TI-2020-13276 Apache NuttX (incubating) Out of Bound Write from invalid TCP Urgent length CVSS 3.1CRITICAL 9.1
Sources
- CVE-2025-47868 · CVE Program
- CVE-2025-47868 · NVD
- FIRST EPSS
- GHSA-fj9m-mxr3-fvf7 · GitHub Advisory Database · CC BY 4.0
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