Application crash via unbounded NMEA field copy
Published May 8, 2026 · Updated May 8, 2026
Stack buffer overflow in kosma minmea 0.3.0 allows context-dependent attackers to crash applications via an oversized NMEA field. The s format handler in minmea_scan copies each printable field byte into the caller-provided buffer until a delimiter, then appends a null byte, without accepting or enforcing a destination size. Reachability requires an application to parse NMEA input from a spoofed GPS source or compromised serial path; only printable bytes pass validation, so code execution is not established.
Summary
What happened
Stack buffer overflow in kosma minmea 0.3.0 allows context-dependent attackers to crash applications via an oversized NMEA field. The s format handler in minmea_scan copies each printable field byte into the caller-provided buffer until a delimiter, then appends a null byte, without accepting or enforcing a destination size. Reachability requires an application to parse NMEA input from a spoofed GPS source or compromised serial path; only printable bytes pass validation, so code execution is not established.
The record
- CVE
- CVE-2026-29974
- Published
- May 8, 2026
- Updated
- May 8, 2026
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-121, T1499.004
- Attack vector
- adjacent
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 8, 2026CVE publishedPublication date reported by the CVE source.
- May 8, 2026Record updatedLatest update available in the CVE record.
Exploitability
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Attacks
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Technologies
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