Bug 2531573 (CVE-2026-88053) - CVE-2026-88053 tesseract: Tesseract: Heap out-of-bounds write leads to heap corruption via crafted data file
Summary: CVE-2026-88053 tesseract: Tesseract: Heap out-of-bounds write leads to heap c...
Keywords:
Status: NEW
Alias: CVE-2026-88053
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2531779
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-10 17:52 UTC by OSIDB Bzimport
Modified: 2026-11-09 11:53 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:95085 0 None None None 2026-11-04 11:44:22 UTC
Red Hat Product Errata RHSA-2026:95086 0 None None None 2026-11-04 13:04:21 UTC
Red Hat Product Errata RHSA-2026:95725 0 None None None 2026-11-05 23:24:36 UTC
Red Hat Product Errata RHSA-2026:96238 0 None None None 2026-11-09 11:53:07 UTC
Red Hat Product Errata RHSA-2026:96239 0 None None None 2026-11-09 11:41:20 UTC

Description OSIDB Bzimport 2026-09-10 17:52:30 UTC 
Tesseract is an open source OCR engine. In version 5.5.3 and earlier, Classify::ReadIntTemplates in src/classify/intproto.cpp reads NumClassPruners, NumClasses, and NumProtoSets from the TESSDATA_INTTEMP component of a crafted .traineddata file and uses those values as loop bounds without validating them against MAX_NUM_CLASS_PRUNERS, MAX_NUM_CLASSES, and MAX_NUM_PROTO_SETS. The loops store heap pointers into fixed-capacity ClassPruners and ProtoSets arrays in INT_TEMPLATES_STRUCT and INT_CLASS_STRUCT, so an oversized count causes heap out-of-bounds pointer writes during legacy-classifier initialization before OCR begins, resulting in heap corruption, a crash, or potentially controlled corruption. No fixed release is available as of this review.
Comment 2 Jon Orris 2026-11-04 11:44:21 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:95085 https://access.redhat.com/errata/RHSA-2026:95085
Comment 3 Jon Orris 2026-11-04 13:04:20 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:95086 https://access.redhat.com/errata/RHSA-2026:95086
Comment 4 Jon Orris 2026-11-05 23:24:35 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:95725 https://access.redhat.com/errata/RHSA-2026:95725
Comment 5 errata-xmlrpc 2026-11-09 11:41:19 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On

Via RHSA-2026:96239 https://access.redhat.com/errata/RHSA-2026:96239
Comment 6 errata-xmlrpc 2026-11-09 11:53:05 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.8 Telecommunications Update Service

Via RHSA-2026:96238 https://access.redhat.com/errata/RHSA-2026:96238
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