CVE-2026-46243

June 1, 2026, 9:16 p.m.

7.8
High

Description

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.

Product(s) Impacted

Vendor Product Versions
Linux
  • Linux Kernel
  • *

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-20
Improper Input Validation
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

*CPE(s)

Affected systems and software identified for this CVE.

Type Vendor Product Version Update Edition Language Software Edition Target Software Target Hardware Other Information
a linux linux_kernel / / / / / / / /

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
https://git.kernel.org/stable/c/9544559e59438a4b609b2fdfa0763d8360572824
https://git.kernel.org/stable/c/a3bbda6502a9398b816fa2e71c9a3f955f58013d
https://git.kernel.org/stable/c/cf20038657d6d4974349556a34e08fe0490bebbc
http://www.openwall.com/lists/oss-security/2026/06/01/6
https://github.com/manizada/CIFSwitch

Tags

CWE-20
416baaa9-dc9f-4396-8d5f-8c081fb06d67
2026-06-01
CVE-2026-46243

CVSS Score

7.8 / 10

CVSS Data - 3.1

  • Attack Vector: LOCAL
  • Attack Complexity: LOW
  • Privileges Required: LOW
  • Scope: UNCHANGED
  • Confidentiality Impact: HIGH
  • Integrity Impact: HIGH
  • Availability Impact: HIGH

    • CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

    View Vector String

Timeline

Published: June 1, 2026, 5:17 p.m.
Last Modified: June 1, 2026, 9:16 p.m.

Status : Awaiting Analysis

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

416baaa9-dc9f-4396-8d5f-8c081fb06d67

*Disclaimer: Some vulnerabilities do not have an associated CPE. To enhance the data, we use AI to infer CPEs based on CVE details. This is an automated process and might not always be accurate.