CVE-2023-1206

kernel: hash collisions in the IPv6 connection lookup table

Published Jun 30, 2023 CVSS 3.1 · 5.7 Medium EPSS < 1% KEV · Not listed
Description
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%.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DLA Debian DLA DLA-3623-1 linux-5.10 security update
Debian DLA Debian DLA DLA-3710-1 linux security update
Debian DSA Debian DSA DSA-5480-1 linux security update
Debian DSA Debian DSA DSA-5492-1 linux security update
Ubuntu USN Ubuntu USN USN-6343-1 Linux kernel (OEM) vulnerabilities
Ubuntu USN Ubuntu USN USN-6385-1 Linux kernel (OEM) vulnerabilities
Ubuntu USN Ubuntu USN USN-6412-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-6416-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-6416-2 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-6416-3 Linux kernel (Raspberry Pi) vulnerabilities
Ubuntu USN Ubuntu USN USN-6417-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-6439-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-6439-2 Linux kernel (AWS) vulnerabilities
Ubuntu USN Ubuntu USN USN-6440-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-6440-2 Linux kernel (Azure) vulnerabilities
Ubuntu USN Ubuntu USN USN-6440-3 Linux kernel (HWE) vulnerabilities
Ubuntu USN Ubuntu USN USN-6445-1 Linux kernel (Intel IoTG) vulnerabilities
Ubuntu USN Ubuntu USN USN-6445-2 Linux kernel (Intel IoTG) vulnerabilities
Ubuntu USN Ubuntu USN USN-6460-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-6466-1 Linux kernel (NVIDIA) vulnerabilities
History
Type Values Removed Values Added
Metrics epss

{'score': 0.0002}

epss

{'score': 0.00021}

Type Values Removed Values Added
Weaknesses CWE-327
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
redhat
Published
Updated
Oct 14, 2026, 8:24 PM
Reserved
Mar 6, 2023, 12:00 AM
Status
Modified
Published
Jun 30, 2023, 10:15 PM
Modified
Oct 14, 2026, 9:17 PM
Severity
Moderate
Public date
Jun 7, 2023, 12:00 AM