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CVE-2026-46243

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
01/06/2026
Last modified:
07/07/2026

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> smb: client: reject userspace cifs.spnego descriptions<br /> <br /> cifs.spnego key descriptions contain authority-bearing fields such as<br /> pid, uid, creduid, and upcall_target that cifs.upcall treats as<br /> kernel-originating inputs. However, userspace can also create keys of<br /> this type through request_key(2) or add_key(2), allowing those fields to<br /> be supplied without CIFS origin.<br /> <br /> Only accept cifs.spnego descriptions while CIFS is using its private<br /> spnego_cred to request the key.

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N CVSS v3.1 Severity and Metrics:

Base Score: 7.10 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): None

Base Score 3.x
7.10
Severity 3.x
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 2.6.24.1 (including) 5.10.258 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.11 (including) 5.15.209 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.16 (including) 6.1.175 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.2 (including) 6.6.142 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.7 (including) 6.12.92 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.13 (including) 6.18.34 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.19 (including) 7.0.11 (excluding)
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:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools