{"id":"CVE-2026-68130","summary":"ksmbd: defer destroy_previous_session() until after NTLM authentication","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: defer destroy_previous_session() until after NTLM authentication\n\nIn ntlm_authenticate(), destroy_previous_session() is called using a\nuser pointer resolved from the client-supplied NTLM blob username field\nbefore the NTLMv2 response is validated. An authenticated attacker can\nset the NTLM blob username to match a victim account and set\nPreviousSessionId to the victim's session ID; destroy_previous_session()\ndestroys the victim's session while ksmbd_decode_ntlmssp_auth_blob()\nsubsequently rejects the request with -EPERM.\n\nMove destroy_previous_session() and the prev_id assignment to after\nksmbd_decode_ntlmssp_auth_blob() returns success and use sess-\u003euser\nrather than the pre-authentication lookup result. This matches the\nordering already used by krb5_authenticate(), where\ndestroy_previous_session() is called only after\nksmbd_krb5_authenticate() returns success.","modified":"2026-08-21T03:30:18.558534499Z","published":"2026-08-10T11:58:52.653Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68130.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0ff12308c8a6c16ab68f0a487ffa93d69001dc18"},{"type":"WEB","url":"https://git.kernel.org/stable/c/18705cace0619fd2123737dcd028147774f38181"},{"type":"WEB","url":"https://git.kernel.org/stable/c/243f1614ef2aca2d62a744575f1c24b07cd42757"},{"type":"WEB","url":"https://git.kernel.org/stable/c/370b0ec8822b69c9073265e16b7daaa8201c9a4f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5c833074b549e5db125436a6f681af682261f785"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c74801ee524f477c174a1899782b6c3b6918d407"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68130.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-68130"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9"},{"fixed":"370b0ec8822b69c9073265e16b7daaa8201c9a4f"},{"fixed":"5c833074b549e5db125436a6f681af682261f785"},{"fixed":"243f1614ef2aca2d62a744575f1c24b07cd42757"},{"fixed":"18705cace0619fd2123737dcd028147774f38181"},{"fixed":"0ff12308c8a6c16ab68f0a487ffa93d69001dc18"},{"fixed":"c74801ee524f477c174a1899782b6c3b6918d407"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-68130.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.15.0"},{"fixed":"6.1.183"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.148"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.101"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.42"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-68130.json"}}],"schema_version":"1.9.0"}