CVE-2023-5633

Kernel: vmwgfx: reference count issue leads to use-after-free in surface handling

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.

Remediation

Workaround:

  • This flaw can be mitigated by turning off 3D acceleration in VMware (if possible) or preventing the affected `vmwgfx` kernel module from being loaded. For instructions on how to blacklist a kernel module, please see https://access.redhat.com/solutions/41278.

Category

7.8
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.01%
Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com
Affected: Red Hat Red Hat Enterprise Linux 8
Affected: Red Hat Red Hat Enterprise Linux 8
Affected: Red Hat Red Hat Enterprise Linux 8.8 Extended Update Support
Affected: Red Hat Red Hat Enterprise Linux 9
Affected: Red Hat Red Hat Enterprise Linux 9
Affected: Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support
Affected: Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support
Affected: Red Hat Red Hat Enterprise Linux 6
Affected: Red Hat Red Hat Enterprise Linux 7
Affected: Red Hat Red Hat Enterprise Linux 7
Affected: Red Hat Red Hat Enterprise Linux 9
Published at:
Updated at:

References

Link Tags
https://access.redhat.com/errata/RHSA-2024:0113 third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2024:0134 third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2024:0461 third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2024:1404 third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2024:4823 third party advisory vendor advisory
https://access.redhat.com/errata/RHSA-2024:4831 third party advisory vendor advisory
https://access.redhat.com/security/cve/CVE-2023-5633 third party advisory vdb entry
https://bugzilla.redhat.com/show_bug.cgi?id=2245663 patch issue tracking

Frequently Asked Questions

What is the severity of CVE-2023-5633?
CVE-2023-5633 has been scored as a high severity vulnerability.
How to fix CVE-2023-5633?
As a workaround for remediating CVE-2023-5633: This flaw can be mitigated by turning off 3D acceleration in VMware (if possible) or preventing the affected `vmwgfx` kernel module from being loaded. For instructions on how to blacklist a kernel module, please see https://access.redhat.com/solutions/41278.
Is CVE-2023-5633 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-5633 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-5633?
CVE-2023-5633 affects Red Hat Red Hat Enterprise Linux 8, Red Hat Red Hat Enterprise Linux 8, Red Hat Red Hat Enterprise Linux 8.8 Extended Update Support, Red Hat Red Hat Enterprise Linux 9, Red Hat Red Hat Enterprise Linux 9, Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support, Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support, Red Hat Red Hat Enterprise Linux 6, Red Hat Red Hat Enterprise Linux 7, Red Hat Red Hat Enterprise Linux 7, Red Hat Red Hat Enterprise Linux 9.
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