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.
Scoring
- Severity
- HIGH
- CVSS base score
- 8.6
- CVSS vector
- CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- CWE
- CWE-787
- Published
- 2026-09-10
- Last modified
- 2026-09-10
Affected products
- tesseract-ocr tesseract
Weakness type
Related vulnerabilities
- CVE-2026-45770 — Suricata lua: excessive flow variable registration can bypass sandbox
- CVE-2026-88053 — Tesseract: Heap out-of-bounds write in Classify::ReadIntTemplates via unvalidated counts in crafted .traineddata
- CVE-2026-88052 — Tesseract: Heap out-of-bounds write in UNICHARSET::load_via_fgets via count/insert desynchronization
- CVE-2026-88050 — Tesseract: Out-of-bounds write in UnicharCompress via unvalidated recoder code values
- CVE-2026-88049 — Tesseract: Heap out-of-bounds write in LSTM::Forward via na_/gate-matrix dimension mismatch
- CVE-2026-88048 — Tesseract: Heap out-of-bounds write/read in FullyConnected::Forward via layer/weight-matrix dimension mismatch
- CVE-2026-0310 — PAN-OS: Buffer Overflow Vulnerability via XML Processing
- CVE-2026-56711 — VLC media player 3.0.0 through 3.0.23 Heap Out-of-Bounds Write via Integer Overflow in Picture Allocation