UBUNTU-CVE-2026-42476

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Source

https://ubuntu.com/security/CVE-2026-42476

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42476.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-42476

Upstream

CVE-2026-42476

Published

2026-05-01T15:16:00Z

Modified

2026-05-20T16:25:43.918410733Z

Severity

7.1 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H CVSS Calculator
5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Ubuntu - medium

Summary

[none]

Details

Two heap-based out-of-bounds read vulnerabilities in the STL ASCII file parser in Open CASCADE Technology (OCCT) V800rc5 exist in RWStlReader::ReadAscii because buffers returned by Standard_ReadLineBuffer::ReadLine() are not properly length-validated before strncasecmp or direct byte access. User-assisted attackers can trigger these issues by persuading a victim to open a crafted STL file with extremely short lines, resulting in a denial of service or possible information disclosure.

References

Affected packages

Ubuntu:20.04:LTS / opencascade

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

7.*

7.3.3+dfsg1-1

7.3.3+dfsg1-1build1

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "libocct-data-exchange-7.3",
            "binary_version": "7.3.3+dfsg1-1build1"
        },
        {
            "binary_name": "libocct-draw-7.3",
            "binary_version": "7.3.3+dfsg1-1build1"
        },
        {
            "binary_name": "libocct-foundation-7.3",
            "binary_version": "7.3.3+dfsg1-1build1"
        },
        {
            "binary_name": "libocct-modeling-algorithms-7.3",
            "binary_version": "7.3.3+dfsg1-1build1"
        },
        {
            "binary_name": "libocct-modeling-data-7.3",
            "binary_version": "7.3.3+dfsg1-1build1"
        },
        {
            "binary_name": "libocct-ocaf-7.3",
            "binary_version": "7.3.3+dfsg1-1build1"
        },
        {
            "binary_name": "libocct-visualization-7.3",
            "binary_version": "7.3.3+dfsg1-1build1"
        },
        {
            "binary_name": "occt-draw",
            "binary_version": "7.3.3+dfsg1-1build1"
        },
        {
            "binary_name": "occt-misc",
            "binary_version": "7.3.3+dfsg1-1build1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42476.json"

Ubuntu:22.04:LTS / opencascade

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

7.*

7.5.1+dfsg1-2

7.5.1+dfsg1-2ubuntu1

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "libocct-data-exchange-7.5",
            "binary_version": "7.5.1+dfsg1-2ubuntu1"
        },
        {
            "binary_name": "libocct-draw-7.5",
            "binary_version": "7.5.1+dfsg1-2ubuntu1"
        },
        {
            "binary_name": "libocct-foundation-7.5",
            "binary_version": "7.5.1+dfsg1-2ubuntu1"
        },
        {
            "binary_name": "libocct-modeling-algorithms-7.5",
            "binary_version": "7.5.1+dfsg1-2ubuntu1"
        },
        {
            "binary_name": "libocct-modeling-data-7.5",
            "binary_version": "7.5.1+dfsg1-2ubuntu1"
        },
        {
            "binary_name": "libocct-ocaf-7.5",
            "binary_version": "7.5.1+dfsg1-2ubuntu1"
        },
        {
            "binary_name": "libocct-visualization-7.5",
            "binary_version": "7.5.1+dfsg1-2ubuntu1"
        },
        {
            "binary_name": "occt-draw",
            "binary_version": "7.5.1+dfsg1-2ubuntu1"
        },
        {
            "binary_name": "occt-misc",
            "binary_version": "7.5.1+dfsg1-2ubuntu1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42476.json"

Ubuntu:24.04:LTS / opencascade

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

7.*

7.6.3+dfsg1-7

7.6.3+dfsg1-7.1

7.6.3+dfsg1-7.1build1

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "libocct-data-exchange-7.6t64",
            "binary_version": "7.6.3+dfsg1-7.1build1"
        },
        {
            "binary_name": "libocct-draw-7.6t64",
            "binary_version": "7.6.3+dfsg1-7.1build1"
        },
        {
            "binary_name": "libocct-foundation-7.6t64",
            "binary_version": "7.6.3+dfsg1-7.1build1"
        },
        {
            "binary_name": "libocct-modeling-algorithms-7.6t64",
            "binary_version": "7.6.3+dfsg1-7.1build1"
        },
        {
            "binary_name": "libocct-modeling-data-7.6t64",
            "binary_version": "7.6.3+dfsg1-7.1build1"
        },
        {
            "binary_name": "libocct-ocaf-7.6t64",
            "binary_version": "7.6.3+dfsg1-7.1build1"
        },
        {
            "binary_name": "libocct-visualization-7.6t64",
            "binary_version": "7.6.3+dfsg1-7.1build1"
        },
        {
            "binary_name": "occt-draw",
            "binary_version": "7.6.3+dfsg1-7.1build1"
        },
        {
            "binary_name": "occt-misc",
            "binary_version": "7.6.3+dfsg1-7.1build1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42476.json"

Ubuntu:25.10 / opencascade

Package

Name: opencascade
Purl: pkg:deb/ubuntu/opencascade?arch=source&distro=questing

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

7.*

7.8.1+dfsg1-3

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "libocct-data-exchange-7.8",
            "binary_version": "7.8.1+dfsg1-3"
        },
        {
            "binary_name": "libocct-draw-7.8",
            "binary_version": "7.8.1+dfsg1-3"
        },
        {
            "binary_name": "libocct-foundation-7.8",
            "binary_version": "7.8.1+dfsg1-3"
        },
        {
            "binary_name": "libocct-modeling-algorithms-7.8",
            "binary_version": "7.8.1+dfsg1-3"
        },
        {
            "binary_name": "libocct-modeling-data-7.8",
            "binary_version": "7.8.1+dfsg1-3"
        },
        {
            "binary_name": "libocct-ocaf-7.8",
            "binary_version": "7.8.1+dfsg1-3"
        },
        {
            "binary_name": "libocct-visualization-7.8",
            "binary_version": "7.8.1+dfsg1-3"
        },
        {
            "binary_name": "occt-draw",
            "binary_version": "7.8.1+dfsg1-3"
        },
        {
            "binary_name": "occt-misc",
            "binary_version": "7.8.1+dfsg1-3"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42476.json"

Ubuntu:26.04:LTS / opencascade

Package

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

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Affected versions

7.*

7.8.1+dfsg1-3

7.9.2+dfsg-2

7.9.2+dfsg-3

7.9.2+dfsg-4

Ecosystem specific

{
    "binaries": [
        {
            "binary_name": "libocct-data-exchange-7.9",
            "binary_version": "7.9.2+dfsg-4"
        },
        {
            "binary_name": "libocct-draw-7.9",
            "binary_version": "7.9.2+dfsg-4"
        },
        {
            "binary_name": "libocct-foundation-7.9",
            "binary_version": "7.9.2+dfsg-4"
        },
        {
            "binary_name": "libocct-ivtk-7.9",
            "binary_version": "7.9.2+dfsg-4"
        },
        {
            "binary_name": "libocct-modeling-algorithms-7.9",
            "binary_version": "7.9.2+dfsg-4"
        },
        {
            "binary_name": "libocct-modeling-data-7.9",
            "binary_version": "7.9.2+dfsg-4"
        },
        {
            "binary_name": "libocct-ocaf-7.9",
            "binary_version": "7.9.2+dfsg-4"
        },
        {
            "binary_name": "libocct-visualization-7.9",
            "binary_version": "7.9.2+dfsg-4"
        },
        {
            "binary_name": "occt-draw",
            "binary_version": "7.9.2+dfsg-4"
        },
        {
            "binary_name": "occt-misc",
            "binary_version": "7.9.2+dfsg-4"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-42476.json"