CVE-2023-6356 Kernel: null pointer dereference in nvmet_tcp_build_iovec

What is CVE-2023-6356?

CVE-2023-6356 is a medium-severity vulnerability in Debian Debian Linux, 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 and causing kernel panic and a denial of service.

Weakness: CWE-476

Which versions are affected by CVE-2023-6356?

It affects 17 products.

Products include Debian Debian Linux, 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 and 11 more.

How do I fix CVE-2023-6356?

Apply the vendor's patch.

Is CVE-2023-6356 being exploited?

There is no known exploitation of CVE-2023-6356 in the wild and no public exploit code.

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All Debian Debian Linux vulnerabilities

Sources

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

Also known as DEBIAN-CVE-2023-6356, GHSA-98fx-x879-qp6f, UBUNTU-CVE-2023-6356.