CVE-2022-23094

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2022-01-15 · updated 2026-06-17
Weakness: CWE-476

Description

Libreswan 4.2 through 4.5 allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a crafted IKEv1 packet because pluto/ikev1.c wrongly expects that a state object exists. This is fixed in 4.6.

Affected products

Debian Linux: 10.0
Fedoraproject Fedora: 34, 35
The Libreswan Project libreswan: from 4.2 before 4.6 — fixed in 4.6

How to fix

Upgrade to a fixed version: The Libreswan Project libreswan 4.6. Check the vendor advisory for mitigations.

References

https://github.com/libreswan/libreswan/issues/585
https://libreswan.org/security/CVE-2022-23094
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HPMIHAXWQUJAPCIGNJ5J5Q6ASWQBU7T5/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UFZ7WP5LNNBW5ADIOPDSPQ23SXZJRNMP/
https://www.debian.org/security/2022/dsa-5048
https://github.com/libreswan/libreswan/issues/585
https://libreswan.org/security/CVE-2022-23094
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HPMIHAXWQUJAPCIGNJ5J5Q6ASWQBU7T5/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UFZ7WP5LNNBW5ADIOPDSPQ23SXZJRNMP/
https://www.debian.org/security/2022/dsa-5048

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