{"id":"CVE-2026-25075","aliases":["AZL-80300","DEBIAN-CVE-2026-25075","DLA-4512-1","DSA-6176-1","EUVD-2026-14477","GHSA-frr2-5qjr-h4hw","MGASA-2026-0072","SUSE-SU-2026:0978-1","SUSE-SU-2026:0979-1","SUSE-SU-2026:0980-1","SUSE-SU-2026:0981-1","SUSE-SU-2026:1307-1","SUSE-SU-2026:21203-1","UBUNTU-CVE-2026-25075","USN-8117-1","openSUSE-SU-2026:10441-1","openSUSE-SU-2026:20547-1"],"status":"published","title":"strongSwan 4.5.0 \u003c 6.0.5 EAP-TTLS AVP Parsing Integer Underflow","description":"strongSwan versions 4.5.0 prior to 6.0.5 contain an integer underflow vulnerability in the EAP-TTLS AVP parser that allows unauthenticated remote attackers to cause a denial of service by sending crafted AVP data with invalid length fields during IKEv2 authentication. Attackers can exploit the failure to validate AVP length fields before subtraction to trigger excessive memory allocation or NULL pointer dereference, crashing the charon IKE daemon.","severity":{"version":"4.0","score":8.7,"vector":"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","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.01075,"percentile":0.65216,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":true},"cwes":["CWE-191","CWE-476"],"published":"2026-03-23T00:00:00Z","modified":"2026-11-05T05:40:51Z","exploits":[{"source":"pocgithub","id":"BishopFox/CVE-2026-25075-check","title":"BishopFox/CVE-2026-25075-check","date":"2026-03-26","url":"https://github.com/BishopFox/CVE-2026-25075-check"}],"fixes":[{"ecosystem":"Azure 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4.5.0 \u003c 6.0.5 EAP-TTLS AVP Parsing Integer Underflow","description":"strongSwan versions 4.5.0 prior to 6.0.5 contain an integer underflow vulnerability in the EAP-TTLS AVP parser that allows unauthenticated remote attackers to cause a denial of service by sending crafted AVP data with invalid length fields during IKEv2 authentication. Attackers can exploit the failure to validate AVP length fields before subtraction to trigger excessive memory allocation or NULL pointer dereference, crashing the charon IKE daemon.","status":"published","published":"2026-03-23T18:33:10.952Z","modified":"2026-07-14T15:53:40.465Z","cvss":[{"version":"4.0","score":8.7,"vector":"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","level":"high","assessor":"cna"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-191","CWE-476"],"updated_at":"2026-11-02T13:41:30.911526Z"}],"euvd":[{"id":"EUVD-2026-14477","description":"strongSwan versions 4.5.0 prior to 6.0.5 contain an integer underflow vulnerability in the EAP-TTLS AVP parser that allows unauthenticated remote attackers to cause a denial of service by sending crafted AVP data with invalid length fields during IKEv2 authentication. Attackers can exploit the failure to validate AVP length fields before subtraction to trigger excessive memory allocation or NULL pointer dereference, crashing the charon IKE daemon.","status":"published","published":"2026-03-23T18:33:10Z","modified":"2026-07-14T15:53:40Z","cvss":[{"version":"4.0","score":8.7,"vector":"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","level":"high"}],"updated_at":"2026-11-02T18:19:59.200665Z"}],"ghsa":[{"id":"GHSA-frr2-5qjr-h4hw","title":"strongSwan versions 4.5.0 prior to 6.0.5 contain an integer underflow vulnerability in the EAP...","description":"strongSwan versions 4.5.0 prior to 6.0.5 contain an integer underflow vulnerability in the EAP-TTLS AVP parser that allows unauthenticated remote attackers to cause a denial of service by sending crafted AVP data with invalid length fields during IKEv2 authentication. Attackers can exploit the failure to validate AVP length fields before subtraction to trigger excessive memory allocation or NULL pointer dereference, crashing the charon IKE daemon.","status":"published","published":"2026-03-23T21:30:51Z","modified":"2026-05-04T21:30:23Z","cvss":[{"version":"4.0","score":8.7,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-191"],"updated_at":"2026-11-02T15:07:54.172768Z"}],"nvd":[{"id":"CVE-2026-25075","description":"strongSwan versions 4.5.0 prior to 6.0.5 contain an integer underflow vulnerability in the EAP-TTLS AVP parser that allows unauthenticated remote attackers to cause a denial of service by sending crafted AVP data with invalid length fields during IKEv2 authentication. Attackers can exploit the failure to validate AVP length fields before subtraction to trigger excessive memory allocation or NULL pointer dereference, crashing the charon IKE daemon.","status":"published","published":"2026-03-23T19:16:39.313Z","modified":"2026-07-14T16:16:53.44Z","cvss":[{"version":"4.0","score":8.7,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-191","CWE-476"],"updated_at":"2026-11-02T14:12:10.568062Z"}],"osv":[{"id":"CVE-2026-25075","title":"strongSwan 4.5.0 \u003c 6.0.5 EAP-TTLS AVP Parsing Integer Underflow","description":"strongSwan versions 4.5.0 prior to 6.0.5 contain an integer underflow vulnerability in the EAP-TTLS AVP parser that allows unauthenticated remote attackers to cause a denial of service by sending crafted AVP data with invalid length fields during IKEv2 authentication. Attackers can exploit the failure to validate AVP length fields before subtraction to trigger excessive memory allocation or NULL pointer dereference, crashing the charon IKE daemon.","status":"published","published":"2026-03-23T18:33:10.952Z","modified":"2026-10-28T02:30:39.059656349Z","cvss":[{"version":"4.0","score":8.7,"vector":"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","level":"high"}],"cwes":["CWE-191","CWE-476"],"updated_at":"2026-11-02T15:44:59.438965Z"},{"id":"DEBIAN-CVE-2026-25075","description":"strongSwan versions 4.5.0 prior to 6.0.5 contain an integer underflow vulnerability in the EAP-TTLS AVP parser that allows unauthenticated remote attackers to cause a denial of service by sending crafted AVP data with invalid length fields during IKEv2 authentication. Attackers can exploit the failure to validate AVP length fields before subtraction to trigger excessive memory allocation or NULL pointer dereference, crashing the charon IKE daemon.","status":"published","published":"2026-03-23T19:16:39.313Z","modified":"2026-10-01T03:03:21.73778839Z","cvss":[{"version":"4.0","score":8.7,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high"}],"updated_at":"2026-11-02T15:45:53.877573Z"},{"id":"UBUNTU-CVE-2026-25075","description":"strongSwan versions 4.5.0 prior to 6.0.5 contain an integer underflow vulnerability in the EAP-TTLS AVP parser that allows unauthenticated remote attackers to cause a denial of service by sending crafted AVP data with invalid length fields during IKEv2 authentication. Attackers can exploit the failure to validate AVP length fields before subtraction to trigger excessive memory allocation or NULL pointer dereference, crashing the charon IKE daemon.","status":"published","published":"2026-03-23T13:00:00Z","modified":"2026-10-05T19:21:58.070648018Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"},{"version":"4.0","score":8.7,"vector":"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","level":"high"}],"updated_at":"2026-11-02T16:56:08.726452Z"},{"id":"AZL-80300","title":"CVE-2026-25075 affecting package strongswan for versions less than 5.9.14-9","description":"strongSwan versions 4.5.0 prior to 6.0.5 contain an integer underflow vulnerability in the EAP-TTLS AVP parser that allows unauthenticated remote attackers to cause a denial of service by sending crafted AVP data with invalid length fields during IKEv2 authentication. Attackers can exploit the failure to validate AVP length fields before subtraction to trigger excessive memory allocation or NULL pointer dereference, crashing the charon IKE daemon.","status":"published","published":"2026-03-23T19:16:39Z","modified":"2026-11-05T05:40:51Z","updated_at":"2026-11-05T16:41:24.800038Z"},{"id":"DLA-4512-1","title":"strongswan - security update","status":"published","published":"2026-03-27T00:00:00Z","modified":"2026-03-27T20:01:29.970912Z","updated_at":"2026-11-02T15:46:13.207219Z"},{"id":"DSA-6176-1","title":"strongswan - security update","status":"published","published":"2026-03-23T00:00:00Z","modified":"2026-03-23T18:31:19.6326Z","updated_at":"2026-11-02T15:46:18.296714Z"},{"id":"MGASA-2026-0072","title":"Updated strongswan packages fix security vulnerability","description":"strongSwan 4.5.0 \u003c 6.0.5 EAP-TTLS AVP Parsing Integer Underflow.\n(CVE-2026-25075)\n","status":"published","published":"2026-03-29T00:55:09Z","modified":"2026-04-16T04:41:02.441486757Z","updated_at":"2026-11-02T15:49:43.178336Z"},{"id":"openSUSE-SU-2026:10441-1","title":"strongswan-6.0.5-1.1 on GA media","description":"These are all security issues fixed in the strongswan-6.0.5-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2026-03-26T00:00:00Z","modified":"2026-03-27T08:48:30.334566Z","updated_at":"2026-11-02T16:58:38.415593Z"},{"id":"openSUSE-SU-2026:20547-1","title":"Security update for strongswan","description":"This update for strongswan fixes the following issues:\n\nUpdate to strongswan 6.0.4:\n\n- CVE-2025-9615: NetworkManager File Access (bsc#1257359).\n- CVE-2026-25075: Integer Underflow When Handling EAP-TTLS AVP (bsc#1259472).\n\nChanges for strongswan:\n\n- Fixed a vulnerability in the NetworkManager plugin that potentially\n allows using credentials of other local users. This vulnerability\n has been registered as CVE-2025-9615.\n- The maximum supported length for section names in swanctl.conf\n has been increased to the upper limit of 256 characters that's\n enforced by VICI.\n- Prevent a crash if a confused peer rekeys a Child SA twice before\n sending a delete.\n- Fixed a memory leak if a peer's self-signed certificate is untrusted.\n","status":"published","published":"2026-04-16T09:06:50Z","modified":"2026-04-22T18:24:19.656988Z","updated_at":"2026-11-02T16:58:41.463445Z"},{"id":"SUSE-SU-2026:0978-1","title":"Security update for strongswan","description":"This update for strongswan fixes the following issues:\n\n- CVE-2026-25075: Fixed integer underflow when handling EAP-TTLS AVP (bsc#1259472).\n\nOther bug fixes:\n\n-Fix rpm scripts to not break swanctl.conf use (bsc#1256442):\n   * Guard rpm migration scripts migrating strongswan.service\n     using ipsec.conf on less than 5.8 to strongswan-starter.service\n     by checking the ipsec.service alias provider.\n   * Call systemd macros for both, strongswan-starter and the strongswan service.\n","status":"published","published":"2026-03-23T16:46:24Z","modified":"2026-03-25T08:32:12.574244Z","updated_at":"2026-11-02T15:54:01.262144Z"},{"id":"SUSE-SU-2026:0979-1","title":"Security update for strongswan","description":"This update for strongswan fixes the following issues:\n\n- CVE-2026-25075: Fixed integer underflow when handling EAP-TTLS AVP (bsc#1259472).\n","status":"published","published":"2026-03-23T16:46:31Z","modified":"2026-03-25T08:32:04.738119Z","updated_at":"2026-11-02T15:54:01.262144Z"},{"id":"SUSE-SU-2026:0980-1","title":"Security update for strongswan","description":"This update for strongswan fixes the following issues:\n\n- CVE-2026-25075: Fixed integer underflow when handling EAP-TTLS AVP (bsc#1259472).\n","status":"published","published":"2026-03-23T16:46:54Z","modified":"2026-03-25T08:31:35.525756Z","updated_at":"2026-11-02T15:54:01.262144Z"},{"id":"SUSE-SU-2026:0981-1","title":"Security update for strongswan","description":"This update for strongswan fixes the following issues:\n\n- CVE-2026-25075: Fixed integer underflow when handling EAP-TTLS AVP (bsc#1259472).\n","status":"published","published":"2026-03-23T16:47:22Z","modified":"2026-03-25T08:31:49.591913Z","updated_at":"2026-11-02T15:54:01.262144Z"},{"id":"SUSE-SU-2026:1307-1","title":"Security update for strongswan","description":"This update for strongswan fixes the following issue:\n\n- CVE-2026-25075: integer underflow when handling EAP-TTLS AVP (bsc#1259472).\n","status":"published","published":"2026-04-14T10:35:42Z","modified":"2026-04-15T08:00:07.26678Z","updated_at":"2026-11-02T15:54:01.262144Z"},{"id":"SUSE-SU-2026:21203-1","title":"Security update for strongswan","description":"This update for strongswan fixes the following issues:\n\nUpdate to strongswan 6.0.4:\n\n- CVE-2025-9615: NetworkManager File Access (bsc#1257359).\n- CVE-2026-25075: Integer Underflow When Handling EAP-TTLS AVP (bsc#1259472).\n\nChanges for strongswan:\n\n- Fixed a vulnerability in the NetworkManager plugin that potentially\n allows using credentials of other local users. This vulnerability\n has been registered as CVE-2025-9615.\n- The maximum supported length for section names in swanctl.conf\n has been increased to the upper limit of 256 characters that's\n enforced by VICI.\n- Prevent a crash if a confused peer rekeys a Child SA twice before\n sending a delete.\n- Fixed a memory leak if a peer's self-signed certificate is untrusted.\n","status":"published","published":"2026-04-16T09:05:46Z","modified":"2026-04-22T18:26:11.553984Z","updated_at":"2026-11-02T15:54:02.312556Z"},{"id":"USN-8117-1","title":"strongswan vulnerability","description":"Kazuma Matsumoto discovered that strongSwan incorrectly handled EAP-TTLS\nAVPs when using the eap-ttls plugin. An attacker could possibly use this\nissue to cause strongSwan to consume resources and crash, resulting in a\ndenial of service.","status":"published","published":"2026-03-23T14:30:05Z","modified":"2026-04-27T18:45:29.44259Z","updated_at":"2026-11-02T16:58:22.951676Z"}]}}