CVE-2023-6121: Kernel: nvme: info leak due to out-of-bounds read in nvmet_ctrl_find_get
First published: Thu Nov 16 2023(Updated: )
An out-of-bounds read issue was found in the NVMe-oF/TCP subsystem in the Linux kernel. A remote attacker could send a crafted TCP packet triggering a heap-based buffer overflow that results in kmalloc data to be printed (and potentially leaked) to the kernel ring buffer (dmesg). Upstream refs: <a href="https://lore.kernel.org/linux-nvme/b58a2dc6-cc8f-4d19-9efe-e1d5b4505efc@nvidia.com/T/">https://lore.kernel.org/linux-nvme/b58a2dc6-cc8f-4d19-9efe-e1d5b4505efc@nvidia.com/T/</a> <a href="https://lore.kernel.org/linux-nvme/CAK5usQvxAyC3LJ4OnqerS1P0JpbfFr9uRZmq6Jb4QhaB7AQCoQ@mail.gmail.com/T/">https://lore.kernel.org/linux-nvme/CAK5usQvxAyC3LJ4OnqerS1P0JpbfFr9uRZmq6Jb4QhaB7AQCoQ@mail.gmail.com/T/</a>
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel | <6.7 | 6.7 |
| Redhat Enterprise Linux | =6.0 | |
| Redhat Enterprise Linux | =7.0 | |
| Redhat Enterprise Linux | =8.0 | |
| Redhat Enterprise Linux | =9.0 | |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.112-1 6.11.7-1 6.11.9-1 |
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Reference Links
- https://lore.kernel.org/linux-nvme/b58a2dc6-cc8f-4d19-9efe-e1d5b4505efc@nvidia.com/T/
- https://lore.kernel.org/linux-nvme/CAK5usQvxAyC3LJ4OnqerS1P0JpbfFr9uRZmq6Jb4QhaB7AQCoQ@mail.gmail.com/T/
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2250044
- https://access.redhat.com/errata/RHSA-2024:2394
- https://access.redhat.com/errata/RHSA-2024:2950
- https://access.redhat.com/errata/RHSA-2024:3138
- https://bugzilla.redhat.com/show_bug.cgi?id=2250043
- https://access.redhat.com/security/cve/CVE-2023-6121
- https://lists.debian.org/debian-lts-announce/2024/01/msg00005.html
- https://launchpad.net/bugs/cve/CVE-2023-6121
- https://git.kernel.org/linus/1c22e0295a5eb571c27b53c7371f95699ef705ff
- https://security-tracker.debian.org/tracker/CVE-2023-6121
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-6121
- https://nvd.nist.gov/vuln/detail/CVE-2023-6121
- https://ubuntu.com/security/CVE-2023-6121
Frequently Asked Questions
What is CVE-2023-6121?
CVE-2023-6121 is an out-of-bounds read vulnerability in the NVMe-oF/TCP subsystem in the Linux kernel.
How does CVE-2023-6121 affect the system?
CVE-2023-6121 allows a remote attacker to send a crafted TCP packet, triggering a heap-based buffer overflow that could potentially lead to data leakage.
What is the severity of CVE-2023-6121?
CVE-2023-6121 has a severity rating of medium with a CVSS score of 4.3.
How can I fix CVE-2023-6121?
To fix CVE-2023-6121, users are advised to apply the appropriate security patches provided by their respective Linux distributions or vendor.
Where can I find more information about CVE-2023-6121?
More information about CVE-2023-6121 can be found at the following references: [Red Hat Security Advisory](https://access.redhat.com/security/cve/CVE-2023-6121) and [Red Hat Bugzilla](https://bugzilla.redhat.com/show_bug.cgi?id=2250043).
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