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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.

CVE-2023-4387 is a use-after-free vulnerability identified in the vmxnet3 ethernet NIC driver within the Linux kernel, specifically impacting Red Hat Enterprise Linux 8. The flaw exists in the vmxnet3_rq_alloc_rx_buf function and manifests during the cleanup process in vmxnet3_rq_cleanup_all, where a double-free condition can occur. This double-free leads to memory corruption, which can cause the system to crash (denial of service) and potentially leak sensitive kernel memory information. The vulnerability requires local attacker privileges with low complexity and no user interaction, meaning an attacker with some access to the system could exploit it without needing to trick a user. The impact on confidentiality is significant due to the kernel information leak, and availability is also affected due to system crashes. The vulnerability is specific to VMware’s vmxnet3 driver, commonly used in virtualized environments running Red Hat Enterprise Linux 8. No public exploits have been reported yet, but the nature of the vulnerability makes it a concern for environments where local access might be obtained by malicious insiders or through compromised accounts. The CVSS 3.1 vector (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H) indicates local attack vector, low attack complexity, low privileges required, no user interaction, unchanged scope, high confidentiality impact, no integrity impact, and high availability impact. This vulnerability highlights the risks in virtualized network drivers and the importance of kernel memory management security.

Detailed information about CVE-2023-4387: Use After Free in Red Hat Red Hat Enterprise Linux 8 affecting Red Hat Red Hat Enterprise Linux 8. Get real-time updat

CVE-2023-4387: Use After Free in Red Hat Red Hat Enterprise Linux 8 - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2023-4387: Use After Free in Red Hat Red Hat Enterprise Linux 8

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