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Highest advisory severityMedium 1 vendor · 1 advisory

CVE-2023-6121

CVE-2023-6121: 1 tracked advisory record across Red Hat. Compare vendor sources and published fix guidance.

Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.

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Vendor advisory comparison

Red Hat

1 advisory
  • Advisory severityMedium4.3

    Medium [CVE-2023-6121] Kernel: nvme: info leak due to out-of-bounds read in nvmet_ctrl_find_get

    CVE-2023-6121Source published Source updated

    An out-of-bounds read vulnerability was found in the NVMe-oF/TCP subsystem in the Linux kernel. This issue may allow a remote attacker to send a crafted TCP packet, triggering a heap-based buffer overflow that results in kmalloc data being printed and potentially leaked to the kernel ring buffer (dmesg). Red Hat severity: Low — CVSS 4.3 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N). Weakness: CWE-125. Affected Red Hat products: Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7. Will not fix / out of support: Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7. Red Hat fixing advisory: RHSA-2024:2950, RHSA-2024:3138, RHSA-2024:2394. Affected products named by the advisory: Red Hat package: kernel-rt.

    Affected products in this advisory
    • Red Hat Enterprise Linux 8
    • Red Hat Enterprise Linux 9
    • Red Hat Enterprise Linux 6
    • Red Hat Enterprise Linux 7

    1 more entries in the full advisory.

    Source-reported affected versions
    Affected-version details not available in this record.
    Source-reported fixed versions
    • kernel-rt-0:4.18.0-553.rt7.342.el8_10
    • kernel-0:4.18.0-553.el8_10
    • kernel-0:5.14.0-427.13.1.el9_4
    • RHSA-2024:2950

    2 more entries in the full advisory.

    Mitigation guidance
    • This flaw can be mitigated by explicitly setting the kernel parameter to restrict unprivileged users from using dmesg: ``` sudo sysctl -w kernel.dmesg_restrict=1 ``` To make it persistent between system reboots: ``` echo 'kernel.dmesg_restrict=1' | sudo tee -a /etc/sysctl.conf ```
    Full advisory and evidenceOpen source bulletin

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