medium
4.3
CWE
125 119
EPSS
0.111%
Advisory Published
CVE Published
Updated

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 SoftwareAffected VersionHow to fix
redhat/kernel<6.7
6.7
Red Hat Enterprise Linux=6.0
Red Hat Enterprise Linux=7.0
Red Hat Enterprise Linux=8.0
Red Hat Enterprise Linux=9.0
IBM Security Verify Governance - Identity Manager<=ISVG 10.0.2
IBM Security Verify Governance, Identity Manager Software Stack<=ISVG 10.0.2
IBM Security Verify Governance, Identity Manager Virtual Appliance<=ISVG 10.0.2
IBM Security Verify Governance Identity Manager Container<=ISVG 10.0.2
debian/linux
5.10.223-1
5.10.234-1
6.1.129-1
6.1.135-1
6.12.22-1
6.12.25-1

Remedy

https://git.kernel.org/linus/a07b4970f464f13640e28e16dad6cfa33647cc99

Remedy

https://git.kernel.org/linus/1c22e0295a5eb571c27b53c7371f95699ef705ff

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

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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