### Summary A memory-safety vulnerability in Open Babel's ORCA parser allowed an out-of-bounds write when reading a crafted input file. ### Details The flaw was in the `nAtoms` handling of the ORCA reader. A malformed input caused the parser to write past the end of its destination buffer. ### Impact Open Babel is a C++ library and CLI used to read and write chemistry file formats; it is shipped by Linux distributions and embedded in services that may parse untrusted input. Triggering this