CVE-2026-73066

Name	CVE-2026-73066
Description	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	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	1144388

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
tesseract (PTS)	bullseye	4.1.1-2.1	vulnerable
	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)			1144388

Notes

[trixie] - tesseract <no-dsa> (Minor issue)
https://github.com/tesseract-ocr/tesseract/security/advisories/GHSA-7j76-5rq5-5jg8
https://github.com/tesseract-ocr/tesseract/pull/4588
Fixed by: https://github.com/tesseract-ocr/tesseract/commit/2f4d2f4bf45c363785d7bf1da29b6628f8939a72 (5.5.3)