CVE-2023-0494

A vulnerability was found in X.Org. This issue occurs due to a dangling pointer in DeepCopyPointerClasses that can be exploited by ProcXkbSetDeviceInfo() and ProcXkbGetDeviceInfo() to read and write into freed memory. This can lead to local privilege elevation on systems where the X server runs privileged and remote code execution for ssh X forwarding sessions.

Database specific

{
    "cna_assigner":  "redhat",
    "cwe_ids":  [
        "CWE-416"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/0xxx/CVE-2023-0494.json"
}

References

Affected packages

Git / gitlab.freedesktop.org/xorg/xserver

Affected ranges

Type

GIT

Repo

https://gitlab.freedesktop.org/xorg/xserver

Events

Introduced

af9111ac7fa399a5a33fbfa145060e1850f41e0e

Fixed

0ba6d8c37071131a49790243cdac55392ecf71ec

Database specific

Show details

{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "xorg-server 21.1.7"
                },
                {
                    "last_affected":  "xorg-server 21.1.7"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StandaloneSingleVersion"
        },
        {
            "range":  [
                {
                    "fixed":  "0ba6d8c37071131a49790243cdac55392ecf71ec"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        }
    ]
}

Affected versions

7.*

7.0

xorg-server 21.*

xorg-server 21.1.7

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-0494.json"

vanir_signatures

[
    {
        "deprecated":  false,
        "digest":  {
            "line_hashes":  [
                "74106098508242225049021527155819159703",
                "95056552086437722391515703312333258183",
                "263086816622054653013670691820743023688",
                "187621220841141749469078690120853429229",
                "48794798834028557475176690849393643529"
            ],
            "threshold":  0.9
        },
        "id":  "CVE-2023-0494-3a331a16",
        "signature_type":  "Line",
        "signature_version":  "v1",
        "source":  "https://gitlab.freedesktop.org/xorg/xserver@0ba6d8c37071131a49790243cdac55392ecf71ec",
        "target":  {
            "file":  "Xi/exevents.c"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "function_hash":  "139982773311384739155271790805276520930",
            "length":  4327
        },
        "id":  "CVE-2023-0494-7e05971b",
        "signature_type":  "Function",
        "signature_version":  "v1",
        "source":  "https://gitlab.freedesktop.org/xorg/xserver@0ba6d8c37071131a49790243cdac55392ecf71ec",
        "target":  {
            "file":  "Xi/exevents.c",
            "function":  "DeepCopyPointerClasses"
        }
    }
]

vanir_signatures_modified

"2026-10-21T08:37:52Z"