CVE-2023-6535 Kernel: null pointer dereference in nvmet_tcp_execute_request

What is CVE-2023-6535?

CVE-2023-6535 is a medium-severity vulnerability in Linux kernel, published on 7 Feb 2024. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A flaw was found in the Linux kernel's NVMe driver. This issue may allow an unauthenticated malicious actor to send a set of crafted TCP packages when using NVMe over TCP, leading the NVMe driver to a NULL pointer dereference in the NVMe driver, causing kernel panic and a denial of service.

Weakness: CWE-476

Which versions are affected by CVE-2023-6535?

It affects 16 products.

Products include Linux kernel, Redhat Codeready Linux Builder Eus, Redhat Codeready Linux Builder Eus for Power Little Endian Eus, Redhat Codeready Linux Builder for Arm64 Eus, Redhat Codeready Linux Builder for Ibm Z Systems Eus, Redhat Enterprise Linux and 10 more.

How do I fix CVE-2023-6535?

Apply the vendor's patch.

Is CVE-2023-6535 being exploited?

There is no known exploitation of CVE-2023-6535 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 DEBIAN-CVE-2023-6535, GHSA-v8xr-j3gp-fmxj, UBUNTU-CVE-2023-6535.