Skip to content
VulniPulse
Sign in
Advisory severityMedium5.7Red Hat Linux

Medium [CVE-2023-1206] 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

This medium-severity Red Hat Linux advisory covers CVE-2023-1206 affecting Red Hat Enterprise Linux 8.6 Extended Update Support, Red Hat Enterprise Linux 9.0 Extended Update Support, Red Hat Virtualization 4 for Red Hat Enterprise Linux 8.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2023-1206 Source published Source updated

VulniPulse record published

CVE-2023-1206
Affected products & platforms
Red Hat LinuxLinux Kernel
Open source advisory

Android app · Google Play

Monitor future Red Hat Linux CVEs from your phone.

Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 34 official vendor sources and 160+ reviewed platform categories.

Matching phone alertsOptional email delivery
Get CVE alertsSee app features

Summary

A 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%.

Red Hat severity: Moderate — CVSS 5.7 (CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-327.

Affected Red Hat products: Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 8.6 Extended Update Support; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 9.0 Extended Update Support; Red Hat Virtualization 4 for Red Hat Enterprise Linux 8; 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-2023:6901, RHSA-2023:7077, RHSA-2023:5627, RHSA-2023:6583, RHSA-2023:5604, RHSA-2023:5603.

Affected products named by the advisory: Red Hat package: kernel-rt.

Affected versions

No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.

Official advisory · high-confidence parse· fetched 10 hours ago·verify at source

Fixed versions
  • kernel-rt-0:4.18.0-513.5.1.rt7.307.el8_9
  • kernel-0:4.18.0-513.5.1.el8_9
  • kernel-0:4.18.0-372.75.1.el8_6
  • kernel-0:5.14.0-362.8.1.el9_3
  • kernel-0:5.14.0-70.75.1.el9_0
  • kernel-rt-0:5.14.0-70.75.1.rt21.146.el9_0
  • RHSA-2023:6901
  • RHSA-2023:7077
  • RHSA-2023:5627
  • RHSA-2023:6583
  • RHSA-2023:5604
  • RHSA-2023:5603

Official advisory · high-confidence parse· fetched 10 hours ago·verify at source

Mitigation checklist

Recommended fix / mitigation
  • https://access.redhat.com/solutions/30453

Official advisory · high-confidence parse· fetched 10 hours ago·verify at source

Discussion(0)

No comments yet. Share field notes, upgrade gotchas, or questions — verify against the vendor advisory before acting on community advice.

Sign in to join the discussion.