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THREAT OPS › Threat News › [NVD] CVE-2026-46243 (HIGH 7.1) — In the Linux kernel, the following vulnerability has been resolved: smb: client: reject userspace cifs.spnego descriptions cifs.spnego key descriptions contain authority-bearing fields such as pid, uid, creduid, and upcall_target that cifs.upcall treats as kernel-originating in

[NVD] CVE-2026-46243 (HIGH 7.1) — In the Linux kernel, the following vulnerability has been resolved: smb: client: reject userspace cifs.spnego descriptions cifs.spnego key descriptions contain authority-bearing fields such as pid, uid, creduid, and upcall_target that cifs.upcall treats as kernel-originating in

lownvdPublished 2026-06-01

CVE-2026-46243 CVSS: 7.1 HIGH Published: 2026-06-01T17:17:34.173

In the Linux kernel, the following vulnerability has been resolved:

smb: client: reject userspace cifs.spnego descriptions

cifs.spnego key descriptions contain authority-bearing fields such as pid, uid, creduid, and upcall_target that cifs.upcall treats as kernel-originating inputs. However, userspace can also create keys of this

Indicators of compromise

CVE-2026-46243cve

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-46243