USN-6168-1

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Source
https://ubuntu.com/security/notices/USN-6168-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-6168-1.json
JSON Data
https://api.osv.dev/v1/vulns/USN-6168-1
Upstream
Related
Published
2023-06-15T16:51:34.496295Z
Modified
2025-07-16T08:35:15.383860Z
Summary
libx11 vulnerability
Details

Gregory James Duck discovered that libx11 incorrectly handled certain Request, Event, or Error IDs. If a user were tricked into connecting to a malicious X Server, a remote attacker could possibly use this issue to cause libx11 to crash, resulting in a denial of service.

References

Affected packages

Ubuntu:20.04:LTS / libx11

Package

Name
libx11
Purl
pkg:deb/ubuntu/libx11@2:1.6.9-2ubuntu1.5?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2:1.6.9-2ubuntu1.5

Affected versions

2:1.*

2:1.6.8-1
2:1.6.9-2
2:1.6.9-2ubuntu1
2:1.6.9-2ubuntu1.1
2:1.6.9-2ubuntu1.2

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libx11-6",
            "binary_version": "2:1.6.9-2ubuntu1.5"
        },
        {
            "binary_name": "libx11-6-dbgsym",
            "binary_version": "2:1.6.9-2ubuntu1.5"
        },
        {
            "binary_name": "libx11-6-udeb",
            "binary_version": "2:1.6.9-2ubuntu1.5"
        },
        {
            "binary_name": "libx11-data",
            "binary_version": "2:1.6.9-2ubuntu1.5"
        },
        {
            "binary_name": "libx11-dev",
            "binary_version": "2:1.6.9-2ubuntu1.5"
        },
        {
            "binary_name": "libx11-doc",
            "binary_version": "2:1.6.9-2ubuntu1.5"
        },
        {
            "binary_name": "libx11-xcb-dev",
            "binary_version": "2:1.6.9-2ubuntu1.5"
        },
        {
            "binary_name": "libx11-xcb1",
            "binary_version": "2:1.6.9-2ubuntu1.5"
        },
        {
            "binary_name": "libx11-xcb1-dbgsym",
            "binary_version": "2:1.6.9-2ubuntu1.5"
        }
    ]
}

Ubuntu:22.04:LTS / libx11

Package

Name
libx11
Purl
pkg:deb/ubuntu/libx11@2:1.7.5-1ubuntu0.2?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2:1.7.5-1ubuntu0.2

Affected versions

2:1.*

2:1.7.2-1
2:1.7.2-2
2:1.7.2-2build1
2:1.7.5-1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "libx11-6",
            "binary_version": "2:1.7.5-1ubuntu0.2"
        },
        {
            "binary_name": "libx11-6-dbgsym",
            "binary_version": "2:1.7.5-1ubuntu0.2"
        },
        {
            "binary_name": "libx11-data",
            "binary_version": "2:1.7.5-1ubuntu0.2"
        },
        {
            "binary_name": "libx11-dev",
            "binary_version": "2:1.7.5-1ubuntu0.2"
        },
        {
            "binary_name": "libx11-doc",
            "binary_version": "2:1.7.5-1ubuntu0.2"
        },
        {
            "binary_name": "libx11-xcb-dev",
            "binary_version": "2:1.7.5-1ubuntu0.2"
        },
        {
            "binary_name": "libx11-xcb1",
            "binary_version": "2:1.7.5-1ubuntu0.2"
        },
        {
            "binary_name": "libx11-xcb1-dbgsym",
            "binary_version": "2:1.7.5-1ubuntu0.2"
        }
    ]
}