CVE-2020-1749

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-09-09 · updated 2026-06-17
Weakness: CWE-319

Description

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 kernel: all versions
Red Hat Enterprise Linux: 7.0
RedHat Enterprise Mrg: 2.0

References

https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1749
https://security.netapp.com/advisory/ntap-20201222-0001/
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1749
https://security.netapp.com/advisory/ntap-20201222-0001/

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