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Fencer Vulns
high 7.5

CVE-2022-23094 json

Libreswan 4.2 through 4.5 allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a crafted IK…

published 2022-01-15 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-28199

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.6%
EPSS 2.6% chance of exploitation in 30 days, percentile 85%
public exploits
0
none known

Summary

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.

Patch / fix

  • libreswan libreswan 4.6
  • libreswan Debian 13, Debian 12 4.6-1

debian advisories DEBIAN-CVE-2022-23094

  • libreswan RHEL 8 4.4-4.el8_5
  • libreswan RHEL 8.4 EUS 4.3-6.el8_4

red hat advisories RHSA-2022:0239RHSA-2022:0199

  • libreswan AlmaLinux 8 4.4-4.el8_5

almalinux advisories ALSA-2022:0199

  • libreswan Rocky Linux 8 4.4-4.el8_5

rocky linux advisories RLSA-2022:0199

  • libreswan Alpine 3.24, Alpine 3.23, Alpine 3.22 +7 more 4.6-r0

alpine advisories ALPINE-CVE-2022-23094

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2022-23094 updated cvss 7.5

libreswan: Malicious IKEv1 packet can cause libreswan to restart

  • Red Hat Enterprise Linux AppStream (v. 8) libreswan 4.4-4.el8_5
    fixed: vendor fix RHSA-2022:0199
  • Red Hat Enterprise Linux AppStream EUS (v.8.4) libreswan 4.3-6.el8_4
    fixed: vendor fix RHSA-2022:0239
  • Red Hat Enterprise Linux 6 libreswan Red Hat Enterprise Linux 7 libreswan Red Hat Enterprise Linux 9 libreswan
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.63% chance of exploitation in the next 30 days, higher than 85% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/libreswan/libreswan/issues/585 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.