What is CVE-2023-1206?

CVE-2023-1206 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.7 out of 10, classified as a Uncontrolled Resource Consumption flaw (CWE-400). CVE-2023-1206 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-1206?

CVE-2023-1206 has a CVSS score of 5.7 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2023-1206?

Monitor the NIST NVD and your Linux distribution's security advisories for CVE-2023-1206 patch availability.

Is CVE-2023-1206 actively exploited?

CVE-2023-1206 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Uncontrolled Resource Consumption (CWE-400)?

The product does not properly control the amount of resources it consumes, leading to exhaustion. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/400.html

CVE-2023-1206

Medium

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%.

Package Linux Kernel

Published 2023-06-30

Last modified 2026-10-14

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

5.7

out of 10

Medium

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

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

Weakness type

CWE-400

CVE-2023-1206 is a Uncontrolled Resource Consumption vulnerability

What is Uncontrolled Resource Consumption?

The product does not properly control the amount of resources it consumes, leading to exhaustion. Learn more on MITRE CWE

References

10 total

Red Hat
https://bugzilla.redhat.com/show_bug.cgi?id=2175903

Issue Tracking Third Party Advisory
Debian Security
https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html
Debian Security
https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html
Security
https://security.netapp.com/advisory/ntap-20230929-0006/
Debian Security
https://www.debian.org/security/2023/dsa-5480

Showing 5 of 10 references View all on NVD

Details

CVE ID CVE-2023-1206

Severity Medium

CVSS score 5.7 / 10

CVSS version 3.1

Published 2023-06-30

Modified 2026-10-14

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2023-1206?

CVE-2023-1206 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.7 out of 10 , classified as an Uncontrolled Resource Consumption flaw (CWE-400) . CVE-2023-1206 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2023-1206?

CVE-2023-1206 has a CVSS score of 5.7 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2023-1206?

Monitor the NIST NVD and your Linux distribution's security advisories for CVE-2023-1206 patch availability.
Is CVE-2023-1206 actively exploited?

No. CVE-2023-1206 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.