CVE-2026-47895Network attack vector

Unauthenticated crash via cloned identity double-free

Published Aug 22, 2026 · Updated Aug 22, 2026

Double-free in strongSwan 4.3.3 through 6.0.6 allows remote attackers to crash the IKE daemon via an empty EAP identity. The identification_t clone() method copies an empty, non-NULL encoding pointer without cloning it, so two identity objects free the same allocation. Unauthenticated reachability requires EAP, or IKEv1 XAuth with xauth-eap; a daemon crash is confirmed, while code execution remains unconfirmed.

CVSS severity7.5
High
EPSS probability0.67%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Double-free in strongSwan 4.3.3 through 6.0.6 allows remote attackers to crash the IKE daemon via an empty EAP identity. The identification_t clone() method copies an empty, non-NULL encoding pointer without cloning it, so two identity objects free the same allocation. Unauthenticated reachability requires EAP, or IKEv1 XAuth with xauth-eap; a daemon crash is confirmed, while code execution remains unconfirmed.

The record

CVE
CVE-2026-47895
Published
Aug 22, 2026
Updated
Aug 22, 2026
Vendor
strongSwan
Product
strongSwan
Classifications
CWE-415, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 22, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4..3.3 <6.0.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

strongSwan · strongSwanversion=4..3.3 <6.0.7

Published CVSS scores

7.5SUSECVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
7.5MITRECVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
7.7SUSECVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-415Double Free
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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