CVE-2026-78133 strongSwan - Use After Free

strongSwan 6.0.0 through 6.0.7 contains a use-after-free caused by IKEv2 rekeying collision handling in libcharon, letting attackers cause memory corruption, exploit requires no special privileges.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.43% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Use After Free
Impact
Denial Of Service, Remote Code Execution
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
11 September 2026
Updated
15 October 2026
Weakness
CWE-416

Vendor fix

Update to a version later than 6.0.7 or the latest available version.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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