CVE-2023-5633

Advisory lineage Upstream: 0 Downstream: 18
Modified
Published: 23 Oct 2023, 21:58
Last modified:25 Feb 2026, 18:18

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
7.8 HIGH
v3.1 (cve.org)
EPSS Score
0.01% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

23 Oct 2023, 21:58
Published
Vulnerability first disclosed
25 Feb 2026, 18:18
Last Modified
Vulnerability information updated

Description

The reference count changes made as part of the CVE-2023-33951 and CVE-2023-33952 fixes exposed a use-after-free flaw in the way memory objects were handled when they were being used to store a surface. When running inside a VMware guest with 3D acceleration enabled, a local, unprivileged user could potentially use this flaw to escalate their privileges.

CVSS Metrics

  • v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.01%• Percentile: 3%

Techniques & Countermeasures

  • CWE-911•Improper Update of Reference Count

    The product uses a reference count to manage a resource, but it does not update or incorrectly updates the reference count.

  • CWE-416•Use After Free

    The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Affected Systems

  • linux•linux_kernel

    ≥ 6.1.13, < 6.1.75 | ≥ 6.2, < 6.5.8 | 6.6:rc1 | 6.6:rc2 | 6.6:rc3 | 6.6:rc4 | 6.6:rc5 | 6.6:rc6

  • redhat•codeready_linux_builder

    8.0 | 9.0

  • redhat•codeready_linux_builder_eus

    8.8 | 9.2 | 9.4

  • redhat•codeready_linux_builder_for_arm64

    8.0_aarch64 | 9.0_aarch64

  • redhat•codeready_linux_builder_for_arm64_eus

    8.8_aarch64 | 9.2_aarch64 | 9.4_aarch64

  • redhat•codeready_linux_builder_for_ibm_z_systems

    9.0_s390x

  • redhat•codeready_linux_builder_for_ibm_z_systems_eus

    9.2_s390x | 9.4_s390x

  • redhat•codeready_linux_builder_for_power_little_endian

    8.0_ppc64le | 9.0_ppc64le

  • redhat•codeready_linux_builder_for_power_little_endian_eus

    8.8_ppc64le | 9.2_ppc64le | 9.4_ppc64le

  • redhat•enterprise_linux

    8.0 | 9.0

  • redhat•enterprise_linux_eus

    8.8 | 9.2 | 9.4

  • redhat•enterprise_linux_for_arm_64

    8.0_aarch64 | 9.0_aarch64

  • redhat•enterprise_linux_for_arm_64_eus

    8.8_aarch64 | 9.2_aarch64 | 9.4_aarch64

  • redhat•enterprise_linux_for_ibm_z_systems

    8.0_s390x | 9.0_s390x

  • redhat•enterprise_linux_for_ibm_z_systems_eus

    8.8_s390x | 9.2_s390x | 9.4_s390x

  • redhat•enterprise_linux_for_power_little_endian

    8.0_ppc64le | 9.0_ppc64le

  • redhat•enterprise_linux_for_power_little_endian_eus

    9.2_ppc64le | 9.4_ppc64le

  • redhat•enterprise_linux_for_real_time

    8.0 | 9.0

  • redhat•enterprise_linux_for_real_time_for_nfv

    8.0 | 9.0

  • redhat•enterprise_linux_server_aus

    9.2 | 9.4

  • redhat•enterprise_linux_server_for_power_little_endian_update_services_for_sap_solutions

    8.8 | 9.2_ppc64le

  • redhat•enterprise_linux_server_tus

    8.8

References (8)