medium
5.7
CWE
400
Advisory Published
CVE Published
Updated

CVE-2023-1206

First published: Mon Mar 06 2023(Updated: )

A flaw in the Linux Kernel found in the Linux kernel’s networking stack which permits attackers to force hash collisions in the IPv6 connection lookup table. This results in a significant increase in the cost of lookups, causing increased CPU utilization. This significant CPU usage increase in the Linux kernel subjected to a modified form of the classic IPv6 SYN-Flood. The actual impact of this issue may be a denial of service (due to heightened CPU usage) to hosts which can receive malicious IPv6 traffic.

Credit: secalert@redhat.com secalert@redhat.com secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
redhat/kernel<6.5
6.5
IBM Security Verify Governance - Identity Manager<=ISVG 10.0.2
IBM Security Verify Governance, Identity Manager<=ISVG 10.0.2
Linux kernel<6.5
Red Hat Enterprise Linux=8.0
Red Hat Enterprise Linux=9.0
Fedora=38
debian/linux
5.10.223-1
5.10.226-1
6.1.123-1
6.1.128-1
6.12.12-1
6.12.16-1

Remedy

https://git.kernel.org/linus/08dcdbf6a7b9d14c2302c5bd0c5390ddf122f664

Remedy

https://git.kernel.org/linus/d11b0df7ddf1831f3e170972f43186dad520bfcc

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the severity of CVE-2023-1206?

    CVE-2023-1206 is considered a high-severity vulnerability due to its potential to significantly increase CPU utilization.

  • How do I fix CVE-2023-1206?

    To mitigate CVE-2023-1206, update your Linux kernel to version 6.5 or later.

  • Which systems are affected by CVE-2023-1206?

    CVE-2023-1206 affects several systems, including Red Hat Enterprise Linux versions 8.0 and 9.0, as well as the Linux kernel prior to version 6.5.

  • What impact does CVE-2023-1206 have on system performance?

    CVE-2023-1206 can lead to increased CPU utilization due to forced hash collisions in the IPv6 connection lookup table.

  • Is there a workaround for CVE-2023-1206?

    There are currently no known workarounds for CVE-2023-1206, so updating the kernel is the recommended action.

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