CVE-2023-33952 Kernel: vmwgfx: double free within the handling of vmw_buffer_object objects

What is CVE-2023-33952?

CVE-2023-33952 is a medium-severity use after free vulnerability in Linux kernel, published on 24 Jul 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A double-free vulnerability was found in handling vmw_buffer_object objects in the vmwgfx driver in the Linux kernel. This issue occurs due to the lack of validating the existence of an object prior to performing further free operations on the object, which may allow a local privileged user to escalate privileges and execute code in the context of the kernel.

Weakness: CWE-415

Which versions are affected by CVE-2023-33952?

It affects 4 products.

Products include Linux kernel, Redhat Enterprise Linux, Redhat Enterprise Linux for Real Time, Redhat Enterprise Linux for Real Time for Nfv.

How do I fix CVE-2023-33952?

Apply the vendor's patch.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2023-33952 being exploited?

There is no known exploitation of CVE-2023-33952 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-27638, AZL-27756, BELL-CVE-2023-33952, DEBIAN-CVE-2023-33952, GHSA-8f4h-wr7j-w67m, UBUNTU-CVE-2023-33952.