{"id":"CVE-2026-31409","summary":"ksmbd: unset conn-\u003ebinding on failed binding request","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: unset conn-\u003ebinding on failed binding request\n\nWhen a multichannel SMB2_SESSION_SETUP request with\nSMB2_SESSION_REQ_FLAG_BINDING fails ksmbd sets conn-\u003ebinding = true\nbut never clears it on the error path. This leaves the connection in\na binding state where all subsequent ksmbd_session_lookup_all() calls\nfall back to the global sessions table. This fix it by clearing\nconn-\u003ebinding = false in the error path.","modified":"2026-07-15T01:49:16.795543689Z","published":"2026-04-06T07:38:21.223Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31409.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/282343cf8a4a5a3603b1cb0e17a7083e4a593b03"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6260fc85ed1298a71d24a75d01f8b2e56d489a60"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6ebef4a220a1ebe345de899ebb9ae394206fe921"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7e8b270813079c785696bce8802a3f920665c88c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/89afe5e2dbea6e9d8e5f11324149d06fa3a4efca"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9feb2d1bf86d9e5e66b8565f37f8d3a7d281a772"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d073870dab8f6dadced81d13d273ff0b21cb7f4e"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31409.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-31409"},{"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":"f5a544e3bab78142207e0242d22442db85ba1eff"},{"fixed":"7e8b270813079c785696bce8802a3f920665c88c"},{"fixed":"d073870dab8f6dadced81d13d273ff0b21cb7f4e"},{"fixed":"6ebef4a220a1ebe345de899ebb9ae394206fe921"},{"fixed":"89afe5e2dbea6e9d8e5f11324149d06fa3a4efca"},{"fixed":"9feb2d1bf86d9e5e66b8565f37f8d3a7d281a772"},{"fixed":"6260fc85ed1298a71d24a75d01f8b2e56d489a60"},{"fixed":"282343cf8a4a5a3603b1cb0e17a7083e4a593b03"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-31409.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.15.0"},{"fixed":"5.15.209"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.167"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.130"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.78"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.20"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"6.19.10"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-31409.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}