UBUNTU-CVE-2026-88052

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Source

https://ubuntu.com/security/CVE-2026-88052

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88052.json

JSON Data

https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2026-88052

Upstream

CVE-2026-88052

Published

2026-09-10T18:18:00Z

Modified

2026-09-16T14:02:39Z

Severity

7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/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, 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.

References

Affected packages

Ubuntu:14.04:LTS

tesseract

Package

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

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

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "libtesseract3",
            "binary_version":  "3.03.02-3"
        },
        {
            "binary_name":  "tesseract-ocr",
            "binary_version":  "3.03.02-3"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88052.json"

Ubuntu:16.04:LTS

tesseract

Package

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

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

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "libtesseract3",
            "binary_version":  "3.04.01-4"
        },
        {
            "binary_name":  "tesseract-ocr",
            "binary_version":  "3.04.01-4"
        },
        {
            "binary_name":  "tesseract-ocr-all",
            "binary_version":  "3.04.01-4"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88052.json"

Ubuntu:18.04:LTS

tesseract

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

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

{
    "binaries":  [
        {
            "binary_name":  "libtesseract4",
            "binary_version":  "4.00~git2288-10f4998a-2"
        },
        {
            "binary_name":  "tesseract-ocr",
            "binary_version":  "4.00~git2288-10f4998a-2"
        },
        {
            "binary_name":  "tesseract-ocr-all",
            "binary_version":  "4.00~git2288-10f4998a-2"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88052.json"

Ubuntu:20.04:LTS

tesseract

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

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

{
    "binaries":  [
        {
            "binary_name":  "libtesseract4",
            "binary_version":  "4.1.1-2build2"
        },
        {
            "binary_name":  "tesseract-ocr",
            "binary_version":  "4.1.1-2build2"
        },
        {
            "binary_name":  "tesseract-ocr-all",
            "binary_version":  "4.1.1-2build2"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88052.json"

Ubuntu:22.04:LTS

tesseract

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

4.*

4.1.1-2.1

4.1.1-2.1build1

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "libtesseract4",
            "binary_version":  "4.1.1-2.1build1"
        },
        {
            "binary_name":  "tesseract-ocr",
            "binary_version":  "4.1.1-2.1build1"
        },
        {
            "binary_name":  "tesseract-ocr-all",
            "binary_version":  "4.1.1-2.1build1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88052.json"

Ubuntu:24.04:LTS

tesseract

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

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

{
    "binaries":  [
        {
            "binary_name":  "libtesseract5",
            "binary_version":  "5.3.4-1build5"
        },
        {
            "binary_name":  "tesseract-ocr",
            "binary_version":  "5.3.4-1build5"
        },
        {
            "binary_name":  "tesseract-ocr-all",
            "binary_version":  "5.3.4-1build5"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88052.json"

Ubuntu:26.04:LTS

tesseract

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

5.*

5.5.0-1

5.5.0-1build1

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "libtesseract5",
            "binary_version":  "5.5.0-1build1"
        },
        {
            "binary_name":  "tesseract-ocr",
            "binary_version":  "5.5.0-1build1"
        },
        {
            "binary_name":  "tesseract-ocr-all",
            "binary_version":  "5.5.0-1build1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88052.json"