UBUNTU-CVE-2026-58302

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Source
https://ubuntu.com/security/CVE-2026-58302
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-58302.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-58302
Upstream
Published
2026-06-30T02:16:00Z
Modified
2026-07-01T21:27:57Z
Severity
  • 8.4 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

rtapi_app in linuxcnc-uspace in LinuxCNC before 2.9.9 allows privilege escalation. It is installed SUID root and loads shared library modules via dlopen() by using a user-supplied module name. Insufficient validation of the module name allows path traversal, enabling an unprivileged local user to load an arbitrary shared library. Because the process retains elevated privileges during module loading, this results in local privilege escalation to root.

References

Affected packages

Ubuntu:25.10 / linuxcnc

Package

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

Affected ranges

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

Affected versions

1:2.*
1:2.9.4-2ubuntu1
1:2.9.4-2ubuntu2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "linuxcnc-doc-de",
            "binary_version": "1:2.9.4-2ubuntu2"
        },
        {
            "binary_name": "linuxcnc-doc-en",
            "binary_version": "1:2.9.4-2ubuntu2"
        },
        {
            "binary_name": "linuxcnc-doc-es",
            "binary_version": "1:2.9.4-2ubuntu2"
        },
        {
            "binary_name": "linuxcnc-doc-fr",
            "binary_version": "1:2.9.4-2ubuntu2"
        },
        {
            "binary_name": "linuxcnc-doc-zh-cn",
            "binary_version": "1:2.9.4-2ubuntu2"
        },
        {
            "binary_name": "linuxcnc-uspace",
            "binary_version": "1:2.9.4-2ubuntu2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-58302.json"

Ubuntu:26.04:LTS / linuxcnc

Package

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

Affected ranges

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

Affected versions

1:2.*
1:2.9.4-2ubuntu2
1:2.9.4-2ubuntu3
1:2.9.4-2ubuntu4

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "linuxcnc-doc-de",
            "binary_version": "1:2.9.4-2ubuntu4"
        },
        {
            "binary_name": "linuxcnc-doc-en",
            "binary_version": "1:2.9.4-2ubuntu4"
        },
        {
            "binary_name": "linuxcnc-doc-es",
            "binary_version": "1:2.9.4-2ubuntu4"
        },
        {
            "binary_name": "linuxcnc-doc-fr",
            "binary_version": "1:2.9.4-2ubuntu4"
        },
        {
            "binary_name": "linuxcnc-doc-zh-cn",
            "binary_version": "1:2.9.4-2ubuntu4"
        },
        {
            "binary_name": "linuxcnc-uspace",
            "binary_version": "1:2.9.4-2ubuntu4"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-58302.json"