CVE-2023-6238 Kernel: nvme: memory corruption via unprivileged user passthrough

What is CVE-2023-6238?

CVE-2023-6238 is a medium-severity memory corruption vulnerability in Fedoraproject Fedora, published on 21 Nov 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A buffer overflow vulnerability was found in the NVM Express (NVMe) driver in the Linux kernel. Only privileged user could specify a small meta buffer and let the device perform larger Direct Memory Access (DMA) into the same buffer, overwriting unrelated kernel memory, causing random kernel crashes and memory corruption.

Weakness: CWE-120

Which versions are affected by CVE-2023-6238?

It affects 2 products.

Products include Fedoraproject Fedora, Linux kernel.

How do I fix CVE-2023-6238?

Apply the vendor's patch.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2023-6238 being exploited?

There is no known exploitation of CVE-2023-6238 in the wild and no public exploit code.

Other vulnerabilities in Fedoraproject Fedora

• CVE-2024-4577 PHP-CGI OS Command Injection Exploited Critical 9.8
• CVE-2021-39226 Grafana Authentication Bypass Exploited Critical 9.8
• CVE-2019-5544 VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow Exploited Critical 9.8
• CVE-2024-4947 Google Chromium V8 Type Confusion Exploited Critical 9.6
• CVE-2024-4671 Google Chromium Visuals Use-After-Free Exploited Critical 9.6

All Fedoraproject Fedora vulnerabilities

Sources

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

Also known as DEBIAN-CVE-2023-6238, GHSA-2j83-334m-g9w4, ROOT-OS-DEBIAN-13-CVE-2023-6238, ROOT-OS-UBUNTU-2404-CVE-2023-6238, UBUNTU-CVE-2023-6238.