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.
Metrics
CVSS 3.1 7.1/10
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:NWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= f1d662a7d5e5322e583aad6b3cfec03d8f27b435, < 7713bd320ed4fc3d08a227cd8e41242219a16981; >= f1d662a7d5e5322e583aad6b3cfec03d8f27b435, < 9544559e59438a4b609b2fdfa0763d8360572824; >= f1d662a7d5e5322e583aad6b3cfec03d8f27b435, < cf20038657d6d4974349556a34e08fe0490bebbc; >= f1d662a7d5e5322e583aad6b3cfec03d8f27b435, < 2035acfb17221729b1b8ac335e941868a04ca079; >= f1d662a7d5e5322e583aad6b3cfec03d8f27b435, < a3bbda6502a9398b816fa2e71c9a3f955f58013d; >= f1d662a7d5e5322e583aad6b3cfec03d8f27b435, < 91f89c1d83e80417629791fcef6af8140d7d01c8; >= f1d662a7d5e5322e583aad6b3cfec03d8f27b435, < 0aece6685fc80a8de492688ca2315fb86ec379c7; >= f1d662a7d5e5322e583aad6b3cfec03d8f27b435, < 3da1fdf4efbc490041eb4f836bf596201203f8f2 |
| Linux | Linux | 2.6.24 |
| Red Hat | NVIDIA for RHEL 10 | — |
| Red Hat | Red Hat Enterprise Linux 10 | — |
| Red Hat | Red Hat Enterprise Linux 10 | — |
| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support | — |
| Red Hat | Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION | — |
| Red Hat | Red Hat Enterprise Linux 7 Extended Lifecycle Support | — |
| Red Hat | Red Hat Enterprise Linux 7 Extended Lifecycle Support | — |
| Red Hat | Red Hat Enterprise Linux 8 | — |
| Red Hat | Red Hat Enterprise Linux 8 | — |
| Red Hat | Red Hat Enterprise Linux 8 | — |
| Red Hat | Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | — |
| Red Hat | Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On | — |
| Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | — |
| Red Hat | Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On | — |
| Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service | — |
| Red Hat | Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions | — |
| Red Hat | Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions | — |
| Red Hat | Red Hat Enterprise Linux 9 | — |
| Red Hat | Red Hat Enterprise Linux 9 | — |
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions | — |
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions | — |
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions | — |
| Red Hat | Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions | — |
| Red Hat | Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions | — |
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support | — |
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support | — |
| Red Hat | Red Hat OpenShift Container Platform 4.12 | — |
| Red Hat | Red Hat OpenShift Container Platform 4.13 | — |
| Red Hat | Red Hat OpenShift Container Platform 4.14 | — |
| Red Hat | Red Hat OpenShift Container Platform 4.15 | — |
| Red Hat | Red Hat OpenShift Container Platform 4.16 | — |
| Red Hat | Red Hat OpenShift Container Platform 4.17 | — |
| Red Hat | Red Hat OpenShift Container Platform 4.18 | — |
| Red Hat | Red Hat OpenShift Container Platform 4.19 | — |
| Red Hat | Red Hat OpenShift Container Platform 4.20 | — |
| Red Hat | Red Hat OpenShift Container Platform 4.21 | — |
| Siemens | SIMATIC S7-1500 TM MFP - GNU/Linux subsystem | < * |
References
- https://git.kernel.org/stable/c/0aece6685fc80a8de492688ca2315fb86ec379c7Patch
- https://git.kernel.org/stable/c/2035acfb17221729b1b8ac335e941868a04ca079Patch
- https://git.kernel.org/stable/c/3da1fdf4efbc490041eb4f836bf596201203f8f2Patch
- https://git.kernel.org/stable/c/7713bd320ed4fc3d08a227cd8e41242219a16981Patch
- https://git.kernel.org/stable/c/91f89c1d83e80417629791fcef6af8140d7d01c8Patch
- https://git.kernel.org/stable/c/9544559e59438a4b609b2fdfa0763d8360572824Patch
- https://git.kernel.org/stable/c/a3bbda6502a9398b816fa2e71c9a3f955f58013dPatch
- https://git.kernel.org/stable/c/cf20038657d6d4974349556a34e08fe0490bebbcPatch
- http://www.openwall.com/lists/oss-security/2026/06/01/6Mailing List, Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:23258
- https://access.redhat.com/errata/RHSA-2026:23259
- https://access.redhat.com/errata/RHSA-2026:23329
- https://access.redhat.com/errata/RHSA-2026:23395
- https://access.redhat.com/errata/RHSA-2026:24381
- https://access.redhat.com/errata/RHSA-2026:25908
- https://access.redhat.com/errata/RHSA-2026:26462
- https://access.redhat.com/errata/RHSA-2026:26515
- https://access.redhat.com/errata/RHSA-2026:26535
- https://access.redhat.com/errata/RHSA-2026:26563
- https://access.redhat.com/errata/RHSA-2026:26570
- https://access.redhat.com/errata/RHSA-2026:27708
- https://access.redhat.com/errata/RHSA-2026:27719
- https://access.redhat.com/errata/RHSA-2026:27729
- https://access.redhat.com/errata/RHSA-2026:27735
- https://access.redhat.com/errata/RHSA-2026:28887
- https://access.redhat.com/errata/RHSA-2026:28962
- https://access.redhat.com/errata/RHSA-2026:33219
- https://access.redhat.com/errata/RHSA-2026:33220
- https://access.redhat.com/errata/RHSA-2026:33221
- https://access.redhat.com/errata/RHSA-2026:33222
- https://access.redhat.com/errata/RHSA-2026:33223
- https://access.redhat.com/errata/RHSA-2026:33224
- https://access.redhat.com/errata/RHSA-2026:33225
- https://access.redhat.com/errata/RHSA-2026:33486
- https://access.redhat.com/errata/RHSA-2026:34048
- https://access.redhat.com/errata/RHSA-2026:34757
- https://access.redhat.com/errata/RHSA-2026:34764
- https://access.redhat.com/errata/RHSA-2026:34788
- https://access.redhat.com/errata/RHSA-2026:34815
- https://access.redhat.com/errata/RHSA-2026:36620
- https://access.redhat.com/errata/RHSA-2026:40021
- https://access.redhat.com/errata/RHSA-2026:41236
- https://access.redhat.com/errata/RHSA-2026:47727
- https://access.redhat.com/security/cve/CVE-2026-46243
- https://bugzilla.redhat.com/show_bug.cgi?id=2481486
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html
- https://github.com/manizada/CIFSwitchThird Party Advisory
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46243.json
Timeline
- Published
- Jun 1, 2026
- Last modified
- Oct 15, 2026
- NVD status
- Modified