CVE-2025-70085

An issue was discovered in OpenSatKit 2.2.1. The EventErrStr buffer has a fixed size of 256 bytes. The code uses sprintf to format two filenames (Source1Filename and the string returned by FileUtil_FileStateStr) into this buffer without any length checking and without using bounded format specifiers such as %.*s. If the filename length approaches OS_MAX_PATH_LEN (commonly 64-256 bytes), the combined formatted string together with constant text can exceed 256 bytes, resulting in a stack buffer overflow. Such unsafe sprintf calls are scattered across multiple functions in file.c, including FILE_ConcatenateCmd() and ConcatenateFiles(), all of which fail to validate the output length.

• CWE-121

• https://gist.github.com/jonafk555Third Party Advisory
• https://github.com/OpenSatKit/OpenSatKitProduct
• https://github.com/OpenSatKit/OpenSatKit/releases/tag/v2.2.1Release Notes
• https://raw.githubusercontent.com/OpenSatKit/OpenSatKit/master/cfs/apps/filemgr/fsw/src/file.cThird Party Advisory

Published

Feb 11, 2026

Last Modified

Jun 17, 2026

Status

Analyzed

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