UBUNTU-CVE-2026-88051

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Source
https://ubuntu.com/security/CVE-2026-88051
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88051.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2026-88051
Upstream
Downstream
Related
Published
2026-09-10T18:18:00Z
Modified
2026-10-17T12:56:17Z
Severity
  • 8.6 (High) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVSS Calculator
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Tesseract is an open source OCR engine. In version 5.5.3 and earlier, the callback form of GenericVector::read in src/ccutil/genericvector.h reads the independent int32 fields reserved and size_used_ from a .traineddata model without a cap or an invariant check. reserve(reserved) allocates the backing array, but the callback loop writes size_used_ elements. A crafted TESSDATA_INTTEMP component with version_id 4 or later can therefore set reserved to a small value and size_used_ to a large value when fontinfo_table_.read(fp, read_info) is called from src/classify/intproto.cpp, causing a heap out-of-bounds write of FontInfo structures, heap corruption, a crash, or potentially controlled corruption. No fixed release is available as of this review.

References

Affected packages

Ubuntu:26.10
tesseract

Package

Name
tesseract
Purl
pkg:deb/ubuntu/tesseract?arch=source&distro=stonking

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

5.*
5.5.0-1build1
5.5.0-1.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libtesseract5",
            "binary_version": "5.5.0-1.1"
        },
        {
            "binary_name": "tesseract-ocr",
            "binary_version": "5.5.0-1.1"
        },
        {
            "binary_name": "tesseract-ocr-all",
            "binary_version": "5.5.0-1.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88051.json"
Ubuntu:Pro:14.04:LTS
tesseract

Package

Name
tesseract
Purl
pkg:deb/ubuntu/tesseract?arch=source&distro=esm-infra-legacy%2Ftrusty

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
3.03.02-3ubuntu0.1~esm1

Affected versions

3.*
3.02.02-1
3.03.02-3

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "libtesseract3",
            "binary_version": "3.03.02-3ubuntu0.1~esm1"
        },
        {
            "binary_name": "tesseract-ocr",
            "binary_version": "3.03.02-3ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88051.json"
Ubuntu:Pro:16.04:LTS
tesseract

Package

Name
tesseract
Purl
pkg:deb/ubuntu/tesseract?arch=source&distro=esm-apps-legacy%2Fxenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
3.04.01-4ubuntu0.1~esm1

Affected versions

3.*
3.04.00-5ubuntu1
3.04.01-2
3.04.01-4

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "libtesseract3",
            "binary_version": "3.04.01-4ubuntu0.1~esm1"
        },
        {
            "binary_name": "tesseract-ocr",
            "binary_version": "3.04.01-4ubuntu0.1~esm1"
        },
        {
            "binary_name": "tesseract-ocr-all",
            "binary_version": "3.04.01-4ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88051.json"
Ubuntu:Pro:18.04:LTS
tesseract

Package

Name
tesseract
Purl
pkg:deb/ubuntu/tesseract?arch=source&distro=esm-apps%2Fbionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
4.00~git2288-10f4998a-2ubuntu0.1~esm1

Affected versions

3.*
3.04.01-6
3.04.01-6build1
3.04.01-6build2
4.*
4.00~git2188-cdc35338-4build1
4.00~git2188-cdc35338-5
4.00~git2207-766b7bd6-3.1
4.00~git2219-40f43111-1.2
4.00~git2288-10f4998a-2

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "libtesseract4",
            "binary_version": "4.00~git2288-10f4998a-2ubuntu0.1~esm1"
        },
        {
            "binary_name": "tesseract-ocr",
            "binary_version": "4.00~git2288-10f4998a-2ubuntu0.1~esm1"
        },
        {
            "binary_name": "tesseract-ocr-all",
            "binary_version": "4.00~git2288-10f4998a-2ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88051.json"
Ubuntu:Pro:20.04:LTS
tesseract

Package

Name
tesseract
Purl
pkg:deb/ubuntu/tesseract?arch=source&distro=esm-apps%2Ffocal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
4.1.1-2ubuntu0.1~esm1

Affected versions

4.*
4.1.0-1
4.1.0-2
4.1.1-1
4.1.1-2
4.1.1-2build1
4.1.1-2build2

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "libtesseract4",
            "binary_version": "4.1.1-2ubuntu0.1~esm1"
        },
        {
            "binary_name": "tesseract-ocr",
            "binary_version": "4.1.1-2ubuntu0.1~esm1"
        },
        {
            "binary_name": "tesseract-ocr-all",
            "binary_version": "4.1.1-2ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88051.json"
Ubuntu:Pro:22.04:LTS
tesseract

Package

Name
tesseract
Purl
pkg:deb/ubuntu/tesseract?arch=source&distro=esm-apps%2Fjammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
4.1.1-2.1ubuntu0.1~esm1

Affected versions

4.*
4.1.1-2.1
4.1.1-2.1build1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "libtesseract4",
            "binary_version": "4.1.1-2.1ubuntu0.1~esm1"
        },
        {
            "binary_name": "tesseract-ocr",
            "binary_version": "4.1.1-2.1ubuntu0.1~esm1"
        },
        {
            "binary_name": "tesseract-ocr-all",
            "binary_version": "4.1.1-2.1ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88051.json"
Ubuntu:Pro:24.04:LTS
tesseract

Package

Name
tesseract
Purl
pkg:deb/ubuntu/tesseract?arch=source&distro=esm-apps%2Fnoble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
5.3.4-1ubuntu0.1~esm1

Affected versions

5.*
5.3.0-2build1
5.3.3-1
5.3.3-1build1
5.3.4-1
5.3.4-1build3
5.3.4-1build4
5.3.4-1build5

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "libtesseract5",
            "binary_version": "5.3.4-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "tesseract-ocr",
            "binary_version": "5.3.4-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "tesseract-ocr-all",
            "binary_version": "5.3.4-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88051.json"
Ubuntu:Pro:26.04:LTS
tesseract

Package

Name
tesseract
Purl
pkg:deb/ubuntu/tesseract?arch=source&distro=esm-apps%2Fresolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
5.5.0-1ubuntu0.1~esm1

Affected versions

5.*
5.5.0-1
5.5.0-1build1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "libtesseract5",
            "binary_version": "5.5.0-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "tesseract-ocr",
            "binary_version": "5.5.0-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "tesseract-ocr-all",
            "binary_version": "5.5.0-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88051.json"