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CVE-2026-46243

7.1 high exploit ×5 SSVC exploitation: poc Modified
NVD · CVE.org

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 type through request_key(2) or add_key(2), allowing those fields to be supplied without CIFS origin. Only accept cifs.spnego descriptions while CIFS is using its private spnego_cred to request the key.

Fix

Public exploits 5

Each line links to the index that lists it, never to exploit code. Exploit-DB's "verified" and a Metasploit rank of good or better count as verified; a PoC-in-GitHub entry is a repository's claim.

Patch, vendor advisory and mitigation references on NVD 8

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 1

  1. First seenCVSS 7.1 · linuxNVD modified 2026-10-15 02:19

Affected (CPE criteria) 12

  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:2.6.24:-:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:2.6.24:rc3:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:2.6.24:rc4:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:2.6.24:rc5:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:2.6.24:rc6:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:2.6.24:rc7:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:2.6.24:rc8:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:*

References 48