UBUNTU-CVE-2026-88053

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Source

https://ubuntu.com/security/CVE-2026-88053

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88053.json

JSON Data

https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2026-88053

Upstream

CVE-2026-88053

Downstream

USN-8882-1

Related

USN-8882-1

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, 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.

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-2026-88053.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

Affected versions

3.*

3.02.02-1

3.03.02-3

3.03.02-3ubuntu0.1~esm1

Ecosystem specific

{
    "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-2026-88053.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

Affected versions

3.*

3.04.00-5ubuntu1

3.04.01-2

3.04.01-4

3.04.01-4ubuntu0.1~esm1

Ecosystem specific

{
    "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-2026-88053.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-2026-88053.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-2026-88053.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-2026-88053.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-2026-88053.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-2026-88053.json"