{"id":"CVE-2026-46243","revision":"86201a4809d842f4929525136001d93b","records":[{"revision":"86201a4809d842f4929525136001d93b","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-46243","aliases":[],"title":"smb: client: reject userspace cifs.spnego descriptions","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: reject userspace cifs.spnego descriptions\n\ncifs.spnego key descriptions contain authority-bearing fields such as\npid, uid, creduid, and upcall_target that cifs.upcall treats as\nkernel-originating inputs. However, userspace can also create keys of\nthis type through request_key(2) or add_key(2), allowing those fields to\nbe supplied without CIFS origin.\n\nOnly accept cifs.spnego descriptions while CIFS is using its private\nspnego_cred to request the key.","state":0,"publishedAt":"2026-06-01T16:22:29.211+00:00","modifiedAt":"2026-10-15T01:21:23.53+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"fs/smb/client/cifs_spnego.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"f1d662a7d5e5322e583aad6b3cfec03d8f27b435\",\n                            \"lessThan\": \"7713bd320ed4fc3d08a227cd8e41242219a16981\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f1d662a7d5e5322e583aad6b3cfec03d8f27b435\",\n                            \"lessThan\": \"9544559e59438a4b609b2fdfa0763d8360572824\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f1d662a7d5e5322e583aad6b3cfec03d8f27b435\",\n                            \"lessThan\": \"cf20038657d6d4974349556a34e08fe0490bebbc\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f1d662a7d5e5322e583aad6b3cfec03d8f27b435\",\n                            \"lessThan\": \"2035acfb17221729b1b8ac335e941868a04ca079\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f1d662a7d5e5322e583aad6b3cfec03d8f27b435\",\n                            \"lessThan\": \"a3bbda6502a9398b816fa2e71c9a3f955f58013d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f1d662a7d5e5322e583aad6b3cfec03d8f27b435\",\n                            \"lessThan\": \"91f89c1d83e80417629791fcef6af8140d7d01c8\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f1d662a7d5e5322e583aad6b3cfec03d8f27b435\",\n                            \"lessThan\": \"0aece6685fc80a8de492688ca2315fb86ec379c7\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f1d662a7d5e5322e583aad6b3cfec03d8f27b435\",\n                            \"lessThan\": \"3da1fdf4efbc490041eb4f836bf596201203f8f2\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"fs/smb/client/cifs_spnego.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"2.6.24\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"2.6.24\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.258\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.209\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.175\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.142\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.92\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.34\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.0.11\",\n                            \"lessThanOrEqual\": \"7.0.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","score":7.1,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/7713bd320ed4fc3d08a227cd8e41242219a16981","https://git.kernel.org/stable/c/9544559e59438a4b609b2fdfa0763d8360572824","https://git.kernel.org/stable/c/cf20038657d6d4974349556a34e08fe0490bebbc","https://git.kernel.org/stable/c/2035acfb17221729b1b8ac335e941868a04ca079","https://git.kernel.org/stable/c/a3bbda6502a9398b816fa2e71c9a3f955f58013d","https://git.kernel.org/stable/c/91f89c1d83e80417629791fcef6af8140d7d01c8","https://git.kernel.org/stable/c/0aece6685fc80a8de492688ca2315fb86ec379c7","https://git.kernel.org/stable/c/3da1fdf4efbc490041eb4f836bf596201203f8f2"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-46243","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-46243","identifiers":["CVE-2026-46243"]},"retained":false,"historicalAffected":[]}],"coverage":[]}