CVE-2026-78133

EUVD-2026-75907
libcharon in strongSwan 6.0.0 through 6.0.7 has a use-after-free in IKEv2 rekeying collision handling.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.5 HIGH
NETWORK
HIGH
LOW
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 40.04%
Affected Products (NVD)
VendorProductVersion
strongswanstrongswan
6.0.0 ≤
𝑥
< 6.1.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
strongswan
bookworm
5.9.8-5+deb12u5
fixed
bookworm (security)
5.9.8-5+deb12u5
fixed
forky
6.1.0-2
fixed
sid
6.1.0-2
fixed
trixie
vulnerable
trixie (security)
6.0.1-6+deb13u7
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
strongswan
bionic
not-affected
focal
not-affected
jammy
not-affected
noble
not-affected
resolute
Fixed 6.0.4-1ubuntu3.2
released
trusty
not-affected
xenial
not-affected
Common Weakness Enumeration
References
https://github.com/strongswan/strongswan/releases/tag/6.1.0
https://www.strongswan.org/blog/2026/09/07/strongswan-vulnerability-(cve-2026-78133).html