CVE-2026-88050
Tesseract is an open source OCR engine. In version 5.5.3 and earlier, RecodedCharID::DeSerialize in src/ccutil/unicharcompress.h validates length_ but accepts negative code_ values from a crafted .traineddata recoder component. UnicharCompress::ComputeCodeRange in src/ccutil/unicharcompress.cpp can consequently produce code_range_ equal to zero, after which SetupDecoder indexes is_valid_start_ with the negative code on a size-zero vector. The resulting out-of-bounds bit write uses a large wrapped index and reliably causes a wild-address crash or allocation failure on the default LSTM engine. No fixed release is available as of this review.
Scoring
- Severity
- MEDIUM
- CVSS base score
- 6.9
- CVSS vector
- CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/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-2026-88051 — Tesseract: Heap out-of-bounds write in GenericVector<T>::read due to independent reserved/size_used_ fields
- 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