libtesseract4: Tesseract is an open source OCR engine
CVE-2026-73067 is fixed in 4 products on 1 platform, first by libtesseract5 5.5.0-1ubuntu0.1~esm1, released September 10, 2026. It is not reported as exploited. Patch Radar priority: Routine.
Tesseract is an open source OCR engine. Prior to 5.5.3, a crafted .traineddata model loaded through TessBaseAPI::Init can cause SquishedDawg::read_squished_dawg in src/dict/dawg.cpp to accept an unterminated forward-edge run, after which SquishedDawg::Load calls num_forward_edges(0) and last_edge in src/dict/dawg.h reads beyond edges_, causing a heap out-of-bounds read and process crash before image processing. This issue is fixed in version 5.5.3.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| libtesseract4 · Ubuntu 18.04.6 LTS (bionic) | 4.00~git2288-10f4998a-2ubuntu0.1~esm1 | libtesseract4 4.00~git2288-10f4998a-2ubuntu0.1~esm1 | Oct 7, 2026 |
| libtesseract4 · Ubuntu 20.04 LTS (focal) | 4.1.1-2ubuntu0.1~esm1 | libtesseract4 4.1.1-2ubuntu0.1~esm1 | Oct 7, 2026 |
| libtesseract4 · Ubuntu 22.04.1 LTS (jammy) | 4.1.1-2.1ubuntu0.1~esm1 | libtesseract4 4.1.1-2.1ubuntu0.1~esm1 | Oct 7, 2026 |
| libtesseract5 · Ubuntu 24.04.5 LTS (noble) | 5.3.4-1ubuntu0.1~esm1 | libtesseract5 5.3.4-1ubuntu0.1~esm1 | Oct 7, 2026 |
| libtesseract5 · Ubuntu 26.04.1 LTS (resolute) | 5.5.0-1ubuntu0.1~esm1 | libtesseract5 5.5.0-1ubuntu0.1~esm1 | Sep 10, 2026 |
| tesseract-ocr · Ubuntu 18.04.6 LTS (bionic) | 4.00~git2288-10f4998a-2ubuntu0.1~esm1 | tesseract-ocr 4.00~git2288-10f4998a-2ubuntu0.1~esm1 | Oct 7, 2026 |
| tesseract-ocr · Ubuntu 20.04 LTS (focal) | 4.1.1-2ubuntu0.1~esm1 | tesseract-ocr 4.1.1-2ubuntu0.1~esm1 | Oct 7, 2026 |
| tesseract-ocr · Ubuntu 22.04.1 LTS (jammy) | 4.1.1-2.1ubuntu0.1~esm1 | tesseract-ocr 4.1.1-2.1ubuntu0.1~esm1 | Oct 7, 2026 |
| tesseract-ocr · Ubuntu 24.04.5 LTS (noble) | 5.3.4-1ubuntu0.1~esm1 | tesseract-ocr 5.3.4-1ubuntu0.1~esm1 | Oct 7, 2026 |
| tesseract-ocr · Ubuntu 26.04.1 LTS (resolute) | 5.5.0-1ubuntu0.1~esm1 | tesseract-ocr 5.5.0-1ubuntu0.1~esm1 | Sep 10, 2026 |
| tesseract-ocr · opensuse-leap 16.0 | 5.5.3-bp160.1.1 | OPENSUSE-SU-2026:21957-1 | Sep 24, 2026 |
| tesseract-ocr-all · Ubuntu 18.04.6 LTS (bionic) | 4.00~git2288-10f4998a-2ubuntu0.1~esm1 | tesseract-ocr-all 4.00~git2288-10f4998a-2ubuntu0.1~esm1 | Oct 7, 2026 |
| tesseract-ocr-all · Ubuntu 20.04 LTS (focal) | 4.1.1-2ubuntu0.1~esm1 | tesseract-ocr-all 4.1.1-2ubuntu0.1~esm1 | Oct 7, 2026 |
| tesseract-ocr-all · Ubuntu 22.04.1 LTS (jammy) | 4.1.1-2.1ubuntu0.1~esm1 | tesseract-ocr-all 4.1.1-2.1ubuntu0.1~esm1 | Oct 7, 2026 |
| tesseract-ocr-all · Ubuntu 24.04.5 LTS (noble) | 5.3.4-1ubuntu0.1~esm1 | tesseract-ocr-all 5.3.4-1ubuntu0.1~esm1 | Oct 7, 2026 |
| tesseract-ocr-all · Ubuntu 26.04.1 LTS (resolute) | 5.5.0-1ubuntu0.1~esm1 | tesseract-ocr-all 5.5.0-1ubuntu0.1~esm1 | Sep 10, 2026 |
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