CVE-2023-6238: Kernel: nvme: memory corruption via unprivileged user passthrough
First published: Tue Nov 21 2023(Updated: )
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.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | ||
| Red Hat Fedora | =38 |
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Reference Links
- https://access.redhat.com/security/cve/CVE-2023-6238
- https://bugzilla.redhat.com/show_bug.cgi?id=2250834
- https://lore.kernel.org/linux-nvme/20231013051458.39987-1-joshi.k@samsung.com/T/#u
- https://lore.kernel.org/linux-nvme/20231016060519.231880-1-joshi.k@samsung.com/T/#u
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2250839
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2250834#c4
- https://access.redhat.com/security/updates/classification
Frequently Asked Questions
What is CVE-2023-6238?
CVE-2023-6238 is a buffer overflow vulnerability in the NVM Express (NVMe) driver in the Linux kernel.
How does CVE-2023-6238 impact the system?
CVE-2023-6238 allows an unprivileged user to overwrite kernel memory, causing random kernel crashes.
What is the severity of CVE-2023-6238?
CVE-2023-6238 has a high severity rating with a severity value of 7.
What software is affected by CVE-2023-6238?
The NVM Express (NVMe) driver in the Linux kernel is affected by CVE-2023-6238.
How can I fix CVE-2023-6238?
Users are advised to update to the latest version of the Linux kernel that includes the security patch for CVE-2023-6238.
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