NULL pointer dereference in strongSwan - CVE-2026-78130
Published: September 22, 2026
Vulnerability identifier: #VU151588
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-78130
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to a null pointer dereference in the x509 plugin's attribute certificate validation when validating an X.509 attribute certificate without an issuerName field or AuthorityKeyIdentifier extension. A remote attacker can submit a specially crafted attribute certificate to cause a crash.
Exploitation requires the x509 and acert plugins to be loaded.
Affected software
strongSwan
Debian Linux
strongswan (Debian package)
Debian Linux
strongswan (Debian package)
How to mitigate CVE-2026-78130
Install security update from vendor's website.
strongSwan - update to 6.1.0
strongswan (Debian package) - update to 6.0.1-6+deb13u7
strongswan (Debian package) - update to 6.0.1-6+deb13u7