CVE-2026-88051

Tesseract is an open source OCR engine. In version 5.5.3 and earlier, the callback form of GenericVector::read in src/ccutil/genericvector.h reads the independent int32 fields reserved and size used from a .traineddata model without a cap or an invariant check. reserve(reserved) allocates the backing array, but the callback loop writes size used elements. A crafted TESSDATA INTTEMP component with version id 4 or later can therefore set reserved to a small value and size used to a large value when fontinfo table .read(fp, read info) is called from src/classify/intproto.cpp, causing a heap out-of-bounds write of FontInfo structures, heap corruption, a crash, or potentially controlled corruption. No fixed release is available as of this review.