{"cve":"CVE-2026-46243","nvd":{"published":"2026-06-01T17:17:34.173","modified":"2026-10-15T02:19:51.103","status":"Modified","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.","cvss_v4":null,"cvss_v3":{"version":"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},"cwes":["CWE-20","CWE-825"],"references":["https://git.kernel.org/stable/c/0aece6685fc80a8de492688ca2315fb86ec379c7","https://git.kernel.org/stable/c/2035acfb17221729b1b8ac335e941868a04ca079","https://git.kernel.org/stable/c/3da1fdf4efbc490041eb4f836bf596201203f8f2","https://git.kernel.org/stable/c/7713bd320ed4fc3d08a227cd8e41242219a16981","https://git.kernel.org/stable/c/91f89c1d83e80417629791fcef6af8140d7d01c8"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:37:48.043517290+00:00"},"epss":{"cve":"CVE-2026-46243","score":0.00413,"percentile":0.35264,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}