high
8.2
CWE
415
Advisory Published
CVE Published
Advisory Published
Updated

CVE-2023-33952: Linux Kernel vmwgfx Driver Double Free Local Privilege Escalation Vulnerability

First published: Wed Feb 15 2023(Updated: )

A double free vulnerability was found in the vmwgfx driver in the Linux kernel. Quoting ZDI security advisory [1]: "This vulnerability allows local attackers to escalate privileges on affected installations of Linux Kernel. An attacker must first obtain the ability to execute high-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the handling of vmw_buffer_object objects. The issue results from the lack of validating the existence of an object prior to performing further free operations on the object. An attacker can leverage this vulnerability to escalate privileges and execute code in the context of the kernel." [1] <a href="https://www.zerodayinitiative.com/advisories/ZDI-CAN-20292/">https://www.zerodayinitiative.com/advisories/ZDI-CAN-20292/</a>

Credit: secalert@redhat.com secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
Linux Linux kernel<=6.3.9
Redhat Enterprise Linux=8.0
Redhat Enterprise Linux=9.0
Redhat Enterprise Linux For Real Time=8.0
Redhat Enterprise Linux For Real Time For Nfv=8.0
redhat/kernel<6.4
6.4
Linux kernel

Remedy

https://bugzilla.redhat.com/show_bug.cgi?id=2218212

Remedy

https://www.zerodayinitiative.com/advisories/ZDI-CAN-20292

Remedy

This flaw can be mitigated by 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.

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Reference Links

Frequently Asked Questions

  • What is CVE-2023-33952?

    CVE-2023-33952 is a vulnerability in the Linux Kernel vmwgfx Driver that allows local attackers to escalate privileges on affected installations of Linux Kernel.

  • How does CVE-2023-33952 affect Linux Kernel?

    CVE-2023-33952 affects Linux Kernel by allowing local attackers to escalate privileges.

  • What is the severity of CVE-2023-33952?

    The severity of CVE-2023-33952 is rated as high, with a severity score of 8.2.

  • How can CVE-2023-33952 be exploited?

    To exploit CVE-2023-33952, an attacker must first obtain the ability to execute high-privileged code on the target system.

  • How can I fix the vulnerability CVE-2023-33952 in Linux Kernel?

    To fix the vulnerability CVE-2023-33952 in Linux Kernel, it is recommended to apply the relevant patch provided by the Linux Kernel project.

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