Bug 2531579 (CVE-2026-88052) - CVE-2026-88052 tesseract: Tesseract: Heap out-of-bounds write can lead to arbitrary code execution
Summary: CVE-2026-88052 tesseract: Tesseract: Heap out-of-bounds write can lead to arb...
Keywords:
Status: NEW
Alias: CVE-2026-88052
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2531778
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-10 17:52 UTC by OSIDB Bzimport
Modified: 2026-09-11 07:40 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2026-09-10 17:52:34 UTC
Tesseract is an open source OCR engine. In version 5.5.3 and earlier, UNICHARSET::load_via_fgets in src/ccutil/unicharset.cpp trusts the declared unichar count as a loop bound and uses id as an unchecked index into the unichars vector. unichar_insert_backwards_compatible can leave the vector unchanged for an empty, duplicate, or already-encodable representation, causing id to become larger than unichars.size(). Subsequent set_* calls and the write to unichars[id].properties.enabled then write UNICHAR_PROPERTIES beyond the vector during initialization in both the default LSTM and legacy engines, causing heap corruption, a crash, or potentially controlled corruption. No fixed release is available as of this review.


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