High [CVE-2026-73066] Heap out-of-bounds write via crafted.traineddata
This high-severity Red Hat Linux advisory covers CVE-2026-73066 affecting Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9.
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Summary
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. A remote attacker could exploit this by providing a specially crafted.traineddata LSTM model component.
This vulnerability could result in a denial of service or potentially arbitrary code execution. Red Hat severity: Important — CVSS 7.1 (CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H).
Weakness: CWE-787. Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9.
Red Hat does not currently list a fixing RHSA for this CVE.
Affected products named by the advisory: Red Hat package: tesseract.
- < 5.5.3
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
Mitigation checklist
- To mitigate this issue, avoid processing `.traineddata` files from untrusted sources with Tesseract. Ensure that only `.traineddata` files from known, reputable origins are used for OCR recognition.
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
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