| Name | CVE-2026-88048 |
| Description | Tesseract is an open source OCR engine. In version 5.5.3 and earlier, FullyConnected::DeSerialize in src/lstm/fullyconnected.cpp does not validate the deserialized layer scalars ni_ and no_ against the weight-matrix dimensions. During FullyConnected::Forward, MatrixDotVector in src/lstm/weightmatrix.cpp writes w.dim1() results into temp_line, which is sized from no_, and reads w.dim2() minus one inputs from curr_input, which is sized from ni_. A crafted .traineddata NT_SOFTMAX layer can therefore use inconsistent dimensions to cause a heap out-of-bounds write and read on the default LSTM engine, resulting in heap corruption, a crash, information disclosure, or potentially controlled corruption. No fixed release is available as of this review. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1147403 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| tesseract (PTS) | bookworm | 5.3.0-2 | vulnerable |
| trixie | 5.5.0-1 | vulnerable | |
| forky, sid | 5.5.0-1.1 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| tesseract | source | (unstable) | (unfixed) | 1147403 |
[trixie] - tesseract <no-dsa> (Minor issue)
https://github.com/tesseract-ocr/tesseract/security/advisories/GHSA-q44c-23p6-5mw6
Fixed by: https://github.com/tesseract-ocr/tesseract/commit/103dc134eb36411ddc6833ec20aa2c76795bd0ff