CVE-2023-4387 Kernel: vmxnet3: use-after-free in vmxnet3_rq_alloc_rx_buf()

What is CVE-2023-4387?

CVE-2023-4387 is a high-severity use after free vulnerability in Linux kernel, published on 16 Aug 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A use-after-free flaw was found in vmxnet3_rq_alloc_rx_buf in drivers/net/vmxnet3/vmxnet3_drv.c in VMware's vmxnet3 ethernet NIC driver in the Linux Kernel. This issue could allow a local attacker to crash the system due to a double-free while cleaning up vmxnet3_rq_cleanup_all, which could also lead to a kernel information leak problem.

Weakness: CWE-416

Which versions are affected by CVE-2023-4387?

It affects 2 products.

Products include Linux kernel, Redhat Enterprise Linux.

How do I fix CVE-2023-4387?

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-2023-4387 being exploited?

There is no known exploitation of CVE-2023-4387 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-27960, DEBIAN-CVE-2023-4387, GHSA-5c32-vrpq-fgr5, UBUNTU-CVE-2023-4387.