CVE-2020-1749: Linux Kernel

High severity, CVSS 7.5. EPSS: 1.2% chance of exploitation in the next 30 days.

A flaw was found in the Linux kernel's implementation of some networking protocols in IPsec, such as VXLAN and GENEVE tunnels over IPv6. When an encrypted tunnel is created between two hosts, the kernel isn't correctly routing tunneled data over the encrypted link; rather sending the data unencrypted. This would allow anyone in between the two endpoints to read the traffic unencrypted. The main threat from this vulnerability is to data confidentiality.

Affected products

• Linux Linux Kernel: affected versions not specified
• Red Hat Enterprise Linux: version 7.0 only
• Red Hat Enterprise Mrg: version 2.0 only

Published 2020-09-09. Last modified 2026-06-17.