CVE-2023-1206

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Summary

CVECVE-2023-1206
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2023-06-30 22:15:09 UTC
Updated2026-10-14 21:17:14 UTC
DescriptionA hash collision flaw was found in the IPv6 connection lookup table in the Linux kernel’s IPv6 functionality when a user makes a new kind of SYN flood attack. A user located in the local network or with a high bandwidth connection can increase the CPU usage of the server that accepts IPV6 connections up to 95%.

Risk And Classification

Primary CVSS: v3.1 5.7 MEDIUM from [email protected]

CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.005490000 probability, percentile 0.446010000 (date 2026-10-14)

Problem Types: CWE-400 | CWE-400 CWE-400

CVSS v3.1 Breakdown

Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Fedoraproject Fedora 38 All All All
Operating System Linux Linux Kernel All All All All
Operating System Redhat Enterprise Linux 8.0 All All All
Operating System Redhat Enterprise Linux 9.0 All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na Kernel affected kernel 6.5-rc1 Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 TM MFP - GNU/Linux Subsystem affected V1.1 custom Not specified
ADP Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified

References

ReferenceSourceLinkTags
cert-portal.siemens.com/productcert/html/ssa-398330.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
Debian -- Security Information -- DSA-5492-1 linux af854a3a-2127-422b-91ae-364da2661108 www.debian.org
[SECURITY] [DLA 3623-1] linux-5.10 security update af854a3a-2127-422b-91ae-364da2661108 lists.debian.org
Debian -- Security Information -- DSA-5480-1 linux af854a3a-2127-422b-91ae-364da2661108 www.debian.org
cert-portal.siemens.com/productcert/html/ssa-769027.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
cert-portal.siemens.com/productcert/html/ssa-806742.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
cert-portal.siemens.com/productcert/html/ssa-794697.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
2175903 – (CVE-2023-1206) CVE-2023-1206 kernel: hash collisions in the IPv6 connection lookup table af854a3a-2127-422b-91ae-364da2661108 bugzilla.redhat.com Issue Tracking, Third Party Advisory
CVE-2023-1206 Linux Kernel Vulnerability in NetApp Products | NetApp Product Security af854a3a-2127-422b-91ae-364da2661108 security.netapp.com
lists.debian.org/debian-lts-announce/2024/01/msg00004.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 161066 Oracle Enterprise Linux Security Update for kernel (ELSA-2023-6583)
  • 161147 Oracle Enterprise Linux Security Update for kernel (ELSA-2023-7077)
  • 199764 Ubuntu Security Notification for Linux kernel (OEM) Vulnerabilities (USN-6385-1)
  • 199804 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-6417-1)
  • 199809 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-6416-1)
  • 199810 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-6412-1)
  • 199814 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-6416-2)
  • 199840 Ubuntu Security Notification for Linux kernel (Raspberry Pi) Vulnerabilities (USN-6416-3)
  • 199842 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-6440-1)
  • 199843 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-6439-1)
  • 199844 Ubuntu Security Notification for Linux kernel (Intel IoTG) Vulnerabilities (USN-6445-1)
  • 199849 Ubuntu Security Notification for Linux kernel (Azure) Vulnerabilities (USN-6440-2)
  • 199855 Ubuntu Security Notification for Linux kernel (AWS) Vulnerabilities (USN-6439-2)
  • 199858 Ubuntu Security Notification for Linux kernel (Intel IoTG) Vulnerabilities (USN-6445-2)
  • 199864 Ubuntu Security Notification for Linux kernel (HWE) Vulnerabilities (USN-6440-3)
  • 199874 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-6460-1)
  • 199883 Ubuntu Security Notification for Linux kernel (NVIDIA) Vulnerabilities (USN-6466-1)
  • 242151 Red Hat Update for kernel security (RHSA-2023:5627)
  • 242154 Red Hat Update for kernel (RHSA-2023:5604)
  • 242157 Red Hat Update for kernel-rt (RHSA-2023:5603)
  • 242399 Red Hat Update for kernel security (RHSA-2023:6583)
  • 242434 Red Hat Update for kernel-rt security (RHSA-2023:6901)
  • 242451 Red Hat Update for kernel security (RHSA-2023:7077)
  • 355525 Amazon Linux Security Advisory for kernel : ALAS2023-2023-233
  • 355527 Amazon Linux Security Advisory for kernel : ALAS2KERNEL-5.4-2023-048
  • 355534 Amazon Linux Security Advisory for kernel : ALAS2KERNEL-5.10-2023-035
  • 355537 Amazon Linux Security Advisory for kernel : ALAS2KERNEL-5.15-2023-022
  • 355551 Amazon Linux Security Advisory for kernel : ALAS2-2023-2108
  • 355561 Amazon Linux Security Advisory for kernel : ALAS-2023-1776
  • 379043 Alibaba Cloud Linux Security Update for cloud-kernel (ALINUX3-SA-2023:0136)
  • 379435 Alibaba Cloud Linux Security Update for cloud-kernel (ALINUX2-SA-2024:0012)
  • 6000212 Debian Security Update for linux (DSA 5480-1)
  • 6000220 Debian Security Update for linux (DSA 5492-1)
  • 6000265 Debian Security Update for linux-5.10 (DLA 3623-1)
  • 6000429 Debian Security Update for linux (DLA 3710-1)
  • 6120001 Google COS Security Update for sys-kernel/lakitu-kernel-5_4 (CVE-2023-1206)
  • 6140349 AWS Bottlerocket Security Update for kernel (GHSA-rrr3-w6jw-97j7)
  • 673406 EulerOS Security Update for kernel (EulerOS-SA-2023-3182)
  • 673449 EulerOS Security Update for kernel (EulerOS-SA-2023-2898)
  • 673484 EulerOS Security Update for kernel (EulerOS-SA-2023-3033)
  • 673498 EulerOS Security Update for kernel (EulerOS-SA-2023-3132)
  • 673563 EulerOS Security Update for kernel (EulerOS-SA-2024-1144)
  • 673732 EulerOS Security Update for kernel (EulerOS-SA-2023-3010)
  • 673848 EulerOS Security Update for kernel (EulerOS-SA-2023-3217)
  • 673970 EulerOS Security Update for kernel (EulerOS-SA-2023-2879)
  • 755059 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:4035-1)
  • 755060 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:4031-1)
  • 755061 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:4030-1)
  • 755063 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:4032-1)
  • 755082 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:4058-1)
  • 755083 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:4057-1)
  • 755085 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:4072-1)
  • 755086 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:4071-1)
  • 755096 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:4093-1)
  • 755107 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:4095-1)
  • 755229 SUSE Enterprise Linux Security Update for the Linux Kernel (SUSE-SU-2023:4072-2)
  • 755565 SUSE Security Update for the linux kernel (SUSE-SU-2023:4347-1)
  • 941453 AlmaLinux Security Update for kernel (ALSA-2023:7077)

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