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.
Key facts
- CVSS score
- 7.8 (v3.1)
- Severity
- HIGH
- CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H- Weakness (CWE)
- CWE-416
- EPSS score
- 0.9% (59th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2023-12542)
- Published
- March 27, 2023
- NVD last modified
- June 17, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2023-12542 in the EU Vulnerability Database. Last updated in EUVD on February 24, 2025.
View on the EU Vulnerability DatabaseAffected products
- fedoraproject / fedora
- fedoraproject / fedora
- redhat / enterprise linux
- redhat / enterprise linux
- redhat / enterprise linux
- redhat / enterprise linux aus
- redhat / enterprise linux aus
- redhat / enterprise linux desktop
- redhat / enterprise linux eus
- redhat / enterprise linux eus
- redhat / enterprise linux eus
- redhat / enterprise linux for ibm z systems
- redhat / enterprise linux for ibm z systems
- redhat / enterprise linux for ibm z systems eus
- redhat / enterprise linux for ibm z systems eus
- redhat / enterprise linux for power big endian
- redhat / enterprise linux for power little endian
- redhat / enterprise linux for power little endian
- redhat / enterprise linux for power little endian
- redhat / enterprise linux for power little endian eus
- redhat / enterprise linux for power little endian eus
- redhat / enterprise linux for scientific computing
- redhat / enterprise linux server
- redhat / enterprise linux server aus
- redhat / enterprise linux server for power little endian update services for sap solutions
- redhat / enterprise linux server for power little endian update services for sap solutions
- redhat / enterprise linux server for power little endian update services for sap solutions
- redhat / enterprise linux server for power little endian update services for sap solutions
- redhat / enterprise linux server for power little endian update services for sap solutions
- redhat / enterprise linux server tus
- redhat / enterprise linux server tus
- redhat / enterprise linux server tus
- redhat / enterprise linux server update services for sap solutions
- redhat / enterprise linux server workstation
- x.org / x server
Certified products that may be affected
34 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.
- Red Hat Enterprise Linux 8 NSS Cryptographic Module - Red Hat, Inc. - FIPS 140 5513 - active
- Red Hat Enterprise Linux 8 Kernel Cryptographic API - Red Hat, LLC - FIPS 140 5461 - active
- Red Hat Enterprise Linux 9 Kernel Cryptographic API - Red Hat, Inc. - FIPS 140 5445 - active
- Red Hat Enterprise Linux 9 libgcrypt - Red Hat, Inc. - FIPS 140 5366 - active
- Red Hat Enterprise Linux 8 Kernel Cryptographic API - Red Hat, Inc. - FIPS 140 5089 - active
See all 34 in the Security Certifications Explorer.
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2165995(Issue Tracking, Third Party Advisory)
- https://gitlab.freedesktop.org/xorg/xserver/-/commit/0ba6d8c37071131a49790243cdac55392ecf71ec(Patch)
- https://lists.x.org/archives/xorg-announce/2023-February/003320.html(Mailing List, Vendor Advisory)
- https://security.gentoo.org/glsa/202305-30
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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