{"id":"CVE-2025-62291","details":"In the eap-mschapv2 plugin (client-side) in strongSwan before 6.0.3, a malicious EAP-MSCHAPv2 server can send a crafted message of size 6 through 8, and cause an integer underflow that potentially results in a heap-based buffer overflow.","modified":"2026-08-12T03:51:27.305505697Z","published":"2026-01-16T00:00:00Z","related":["SUSE-SU-2025:21167-1","SUSE-SU-2025:3834-1","SUSE-SU-2025:3855-1","SUSE-SU-2025:3856-1","SUSE-SU-2025:3857-1","SUSE-SU-2025:3873-1","SUSE-SU-2025:3904-1","openSUSE-SU-2025:15681-1","openSUSE-SU-2025:20132-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/62xxx/CVE-2025-62291.json","cna_assigner":"mitre","cwe_ids":["CWE-191"]},"references":[{"type":"WEB","url":"https://github.com/strongswan/strongswan/commits/master/src/libcharon/plugins/eap_mschapv2"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/11/msg00002.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/62xxx/CVE-2025-62291.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-62291"},{"type":"PACKAGE","url":"https://github.com/strongswan/strongswan/releases"},{"type":"ARTICLE","url":"https://www.strongswan.org/blog/2025/10/27/strongswan-vulnerability-%28cve-2025-62291%29.html"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/strongswan/strongswan","events":[{"introduced":"bfde75ee76abb39baa6dfea5f94569551fe80bbf"},{"fixed":"c1605845b4fbc5e2b53aeb0a956578fa10ee5fba"}],"database_specific":{"extracted_events":[{"introduced":"4.2.12"},{"fixed":"6.0.3"},{"introduced":"0"}],"source":["AFFECTED_FIELD","DESCRIPTION"]}}],"versions":["5.9.1","5.9.1rc1","5.9.1dr1","5.9.0","5.9.0rc1","5.9.0dr2","5.9.0dr1","5.8.4","5.8.3","5.8.3rc1","5.8.2","5.8.2rc2","5.8.2rc1","5.8.2dr2","5.8.2dr1","5.8.1","5.8.1rc2","5.8.1dr1","5.8.0","5.8.0rc1","5.8.0dr2","5.7.2","5.7.2rc1","5.7.2dr4","5.7.2dr3","5.7.2dr2","5.7.2dr1","5.7.1","5.7.0","5.7.0rc2","5.7.0rc1","5.7.0dr8","5.7.0dr6","5.7.0dr5","5.7.0dr4","5.7.0dr3","5.7.0dr2","5.7.0dr1","5.6.3","5.6.3rc1","5.6.3dr2","5.6.3dr1","5.6.2","5.6.2rc1","5.6.2dr4","5.6.2dr3","5.6.2dr2","5.6.2dr1","5.6.1","5.6.1rc1","5.6.1dr3","5.6.1dr2","5.6.1dr1","5.6.0","5.6.0rc2","5.6.0rc1","5.6.0dr4","5.6.0dr3","5.6.0dr2","5.6.0dr1","5.5.3","5.5.3dr2","5.5.3dr1","5.5.2","5.5.2rc1","5.5.2dr7","5.5.2dr6","5.5.2dr5","5.5.2dr4","5.5.2dr3","5.5.2dr2","5.5.2dr1","5.5.1","5.5.1rc2","5.5.1rc1","5.5.1dr5","5.5.1dr4","5.5.1dr3","5.5.1dr2","5.5.0","5.5.1dr1","5.5.0rc1","5.5.0dr1","5.4.1dr4","5.4.1dr3","5.4.1dr2","5.4.1dr1","5.4.0","5.4.0rc1","5.4.0dr8","5.4.0dr7","5.4.0dr6","5.4.0dr5","5.4.0dr4","5.4.0dr3","5.4.0dr2","5.4.0dr1","5.3.5","5.3.4","5.3.4rc1","5.3.4dr3","5.3.4dr2","5.3.4dr1","5.3.3","5.3.3rc2","5.3.3dr6","5.3.3dr5","5.3.3dr4","5.3.3dr3","5.3.3dr1","5.3.2","5.3.1","5.3.1rc1","5.3.1dr1","5.3.0","5.3.0rc1","5.3.0dr1","5.2.2","5.2.2rc1","5.2.2dr1","5.2.1","5.2.1rc1","5.2.1dr1","5.2.0","5.2.0rc1","5.2.0dr6","5.2.0dr5","5.2.0dr4","5.2.0dr3","5.2.0dr2","5.2.0dr1","5.1.3","5.1.3rc1","5.1.3dr1","5.1.2","5.1.2rc2","5.1.2rc1","5.1.2dr3","5.1.2.dr2","5.1.2dr1","5.1.1","5.1.1rc1","5.1.1dr4","5.1.1dr3","5.1.1dr2","5.1.1dr1","5.1.0","5.1.0rc1","5.1.0dr2","5.1.0dr1","5.0.4","5.0.3","5.0.3rc1","5.0.2","5.0.3dr3","5.0.3dr2","5.0.3dr1","5.0.2rc1","5.0.2dr4","5.0.1","5.0.0","4.6.3","4.6.2","4.6.1","4.6.0","4.5.3","4.5.2","4.5.1","4.5.0","4.4.1","4.3.6","4.4.0","4.3.5","4.3.5rc1","4.3.4","4.3.3","4.3.2","4.3.1","4.2.14","4.3.0","4.2.13","4.2.12"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-62291.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}