Open Babel has out-of-bounds write in Gaussian translationVectors[]

Description

### Summary A memory-safety vulnerability in Open Babel's Gaussian output parser allowed an out-of-bounds write into the `translationVectors[]` array when reading a crafted input file. ### Details The Gaussian reader stored periodic-cell translation vectors into a fixed-size `translationVectors[]` array. A malformed input could push more vectors than the array had slots, causing a write past the end of the array. This is one of five `translationVectors[]` OOB writes across formats (Gaussian, MOPAC, MOPAC IN, MSI) reported in the TALOS 2022 batch. ### 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 vulnerability requires the victim to open a malicious Gaussian output file with the `obabel` tool, the `OBConversion` API, or any of the language bindings (Python, Ruby, Java, R, Perl, C#, PHP). ### Affected versions All releases up to and including 3.1.1. ### Patched version 3.2.0 (released 2026-05-26). ### Patch Fix commit: https://github.com/openbabel/openbabel/commit/40e85213 A minimized reproducer for this CVE is checked in under `test/files/fuzz_regress/` and is exercised on every CI build under ASAN+UBSAN by the `fuzzregresstest` harness. ### Credit Reported by Cisco TALOS.

Affected Packages (1)