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An issue was discovered in Libreswan before 4.12. When an IKEv2 Child SA REKEY packet contains an invalid IPsec protocol ID number of 0 or 1 an error notify INVALID_SPI is sent back. The notify payload's protocol ID is copied from the incoming packet but the code that verifies outgoing packets fails an assertion that the protocol ID must be ESP (2) or AH(3) and causes the pluto daemon to crash and restart. NOTE: the earliest affected version is 3.20.
| Reporter | Title | Published | Views | Family All 85 |
|---|---|---|---|---|
 | CVE-2023-38710 | 25 Aug 202321:15 | – | attackerkb |
 | Alibaba Cloud Linux 3 : 0039: libreswan (ALINUX3-SA-2024:0039) | 14 May 202500:00 | – | nessus |
| CentOS 8 : libreswan (CESA-2023:7052) | 14 Nov 202300:00 | – | nessus |
| CentOS 9 : libreswan-4.12-1.el9 | 29 Feb 202400:00 | – | nessus |
| Fedora 37 : libreswan (2023-dbc6d8a124) | 20 Aug 202300:00 | – | nessus |
| Fedora 38 : libreswan (2023-ddd6e6b49b) | 20 Aug 202300:00 | – | nessus |
| CBL Mariner 2.0 Security Update: libreswan (CVE-2023-38710) | 3 Jul 202400:00 | – | nessus |
| MiracleLinux 9 : libreswan-4.12-1.el9 (AXSA:2023-6824:09) | 20 Jan 202600:00 | – | nessus |
| MiracleLinux 8 : libreswan-4.12-2.el8 (AXSA:2023-7185:10) | 20 Jan 202600:00 | – | nessus |
| NewStart CGSL MAIN 7.02 : libreswan Multiple Vulnerabilities (NS-SA-2025-0120) | 25 Jul 202500:00 | – | nessus |
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19 Feb 2026 09:17Current
6.5Medium risk
Vulners AI Score6.5
CVSS 3.16.5
EPSS0.00062
SSVC