CVE-2026-46243

CVE Enrichment

CVSS: 7.1 HIGH
EPSS: 0.38%
EPSS Percentile: 30.24%
CISA KEV: Not listed

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.

Technical Details

CVSS Version: 3.1
CNA / NVD Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published: 02-Jun-2026 00:17
Last Modified: 15-Oct-2026 09:19
EPSS Date: 2026-10-20
CWE: CWE-20, CWE-825

CVSS Vector


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

Affected Products / Versions

linux / linux_kernel
Version / affected range: * · from (inclusive) 2.6.24.1 · before (exclusive) 5.10.258
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: * · from (inclusive) 5.11 · before (exclusive) 5.15.209
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: * · from (inclusive) 5.16 · before (exclusive) 6.1.175
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: * · from (inclusive) 6.2 · before (exclusive) 6.6.142
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: * · from (inclusive) 6.7 · before (exclusive) 6.12.92
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: * · from (inclusive) 6.13 · before (exclusive) 6.18.34
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: * · from (inclusive) 6.19 · before (exclusive) 7.0.11
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: 2.6.24
cpe:2.3:o:linux:linux_kernel:2.6.24:-:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: 2.6.24
cpe:2.3:o:linux:linux_kernel:2.6.24:rc3:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: 2.6.24
cpe:2.3:o:linux:linux_kernel:2.6.24:rc4:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: 2.6.24
cpe:2.3:o:linux:linux_kernel:2.6.24:rc5:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: 2.6.24
cpe:2.3:o:linux:linux_kernel:2.6.24:rc6:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: 2.6.24
cpe:2.3:o:linux:linux_kernel:2.6.24:rc7:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: 2.6.24
cpe:2.3:o:linux:linux_kernel:2.6.24:rc8:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: 7.1
cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: 7.1
cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: 7.1
cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: 7.1
cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:*

References

Last enrichment sync: 21-Oct-2026 07:22
Sources: NVD · FIRST EPSS · CISA KEV
Latest successful provider update; providers refresh independently.

Reported Context (1)

CIFSwitch (CVE-2026-46243) Layered Linux Detection Framework Targets Privilege Escalation Across Exploit Families

CVE (9)

MITRE ATT&CK (8)

Vendors (1)

Products (10)

Tools (5)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.