This page tracks the Ubuntu fix status. The vulnerability itself is described on the main CVE page.
View CVE-2026-73066 →
UBUNTU-CVE-2026-73066
Tesseract is an open source OCR engine. Prior to 5.5.3, a crafted .traineddata LSTM model component loaded through Tesseract's deserializer can cause...
Original description
The description as published by the source.
Tesseract is an open source OCR engine. Prior to 5.5.3, a crafted .traineddata LSTM model component loaded through Tesseract's deserializer can cause an unchecked signed integer multiplication in Convolve::DeSerialize in src/lstm/convolve.cpp to wrap the convolution output-channel count, undersizing the forward-pass output buffer while writes use the unwrapped element count and causing a heap out-of-bounds write during OCR recognition. This issue is fixed in version 5.5.3.
Source: OSV.dev (Open Source Vulnerabilities) OSV
Affected packages
Ubuntu:Pro:18.04:LTS
tesseract
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.00~git2288-10f4998a-2ubuntu0.1~esm1"}]}]
Ubuntu:Pro:20.04:LTS
tesseract
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.1-2ubuntu0.1~esm1"}]}]
Ubuntu:Pro:22.04:LTS
tesseract
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.1-2.1ubuntu0.1~esm1"}]}]
Ubuntu:Pro:24.04:LTS
tesseract
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.3.4-1ubuntu0.1~esm1"}]}]
Ubuntu:26.10
tesseract
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:Pro:26.04:LTS
tesseract
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.5.0-1ubuntu0.1~esm1"}]}]
References
- advisory ubuntu.com
- report ubuntu.com
- report cve.org
- report github.com
- report github.com
- report github.com
- report github.com