CVE-2026-88052: fallo de gravedad alta en tesseract-ocr tesseract
Tesseract: Heap out-of-bounds write in UNICHARSET::load_via_fgets via count/insert desynchronization
Publicada el · Actualizada el
Aviso por correo cuando entre en el KEV, tenga PoC pública o suba de nota.
21Vexday Risk Score
Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.
ssvc Trackcvss 7.8epss 0.2%
Tesseract is an open source OCR engine. In version 5.5.3 and earlier, UNICHARSET::load_via_fgets in src/ccutil/unicharset.cpp trusts the declared unichar count as a loop bound and uses id as an unchecked index into the unichars vector. unichar_insert_backwards_compatible can leave the vector unchanged for an empty, duplicate, or already-encodable representation, causing id to become larger than unichars.size(). Subsequent set_* calls and the write to unichars[id].properties.enabled then write UNICHAR_PROPERTIES beyond the vector during initialization in both the default LSTM and legacy engines, causing heap corruption, a crash, or potentially controlled corruption. No fixed release is available as of this review.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Productos afectados
tesseract-ocr · tesseractCVEs relacionadas — tesseract-ocr tesseract
En el mismo producto, de las más peligrosas a las menos.
CVE-2026-119341NONETesseract: File-controlled pointers still reach `delete` in ADAPT_CLASS_STRUCT destructorEPSS 0.3%CVE-2026-88053HIGHTesseract: Heap out-of-bounds write in Classify::ReadIntTemplates via unvalidated counts in crafted .traineddataEPSS 0.2%CVE-2026-88048HIGHTesseract: Heap out-of-bounds write/read in FullyConnected::Forward via layer/weight-matrix dimension mismatchEPSS 0.2%CVE-2026-88051HIGHTesseract: Heap out-of-bounds write in GenericVector<T>::read due to independent reserved/size_used_ fieldsEPSS 0.2%CVE-2026-119339MEDIUMTesseract: Crafted LSTM model (`WeightMatrix` mode byte) triggers `ASSERT_HOST` abort in `WeightMatrix::DeSerializeOld` under `FAST_FLOAT` — Denial of ServiceEPSS 0.2%CVE-2026-88054MEDIUMTesseract: Denial of service via empty-stack dereference in Plumbing/Series at model loadEPSS 0.2%