CVE-2026-88049

Описание

Tesseract is an open source OCR engine. In version 5.5.3 and earlier, prior .traineddata hardening added bounds checks to NetworkIO::CopyTimeStepGeneral and NetworkIO::Randomize in src/lstm/networkio.cpp but left NetworkIO::WriteTimeStepPart and NetworkIO::AddTimeStepPart unchecked. In LSTM::Forward in src/lstm/lstm.cpp, source_ is sized from the independently deserialized na_ field while the WriteTimeStepPart count is ns_, which comes from the CI gate WeightMatrix dim1() value. A crafted NT_LSTM layer can make ns_ much larger than na_, causing a heap out-of-bounds write during the first recognition step on the default LSTM engine and resulting in heap corruption, a crash, or potentially controlled corruption. No fixed release is available as of this review.

A flaw was found in Tesseract, an open-source Optical Character Recognition (OCR) engine. A remote attacker could exploit a heap out-of-bounds write vulnerability in the LSTM::Forward function by providing a specially crafted input. This could lead to heap corruption, application crashes, or potentially controlled memory corruption, which may result in arbitrary code execution or a denial of service.