CVE-2023-1206

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%.

CVSS v3.1

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

EPSS

0.55% chance of exploitation in the next 30 days, 44th percentile

Published

2023-06-30

Updated

2024-10-15

Proof-of-concept exploits (1)

• SpiralBL0CK/CVE-2023-1206-CVE-2025-40040-CVE-2024-49882

References

• CVE Record
• NVD entry

Related

• CVE-2023-1200
• CVE-2023-1207
• CVE-2023-1197
• CVE-2023-1208
• CVE-2023-1196
• CVE-2023-1210