Upstream information
Description
`openvt -u` is intended to identify the owner of the current VT and then execute `login` as that user from a privileged context. In the documented `kbrequest`/init usage, the ownership test in `authenticate_user()` relies on `stat("/proc/<pid>/fd/0")`. `stat()` on `/proc/<pid>/fd/0` follows the symlink to the underlying TTY device node. As a result, `buf.st_uid` reflects the owner of the TTY node rather than the owner of the process holding the file descriptor. If the TTY owner returns to `root` or the getty owner after logout while an unprivileged process still has `fd 0` attached to that TTY, the check can incorrectly treat that process as belonging to the privileged console owner. Once that check succeeds, the `-u` path executes a passwordless login as the selected user. In the documented `kbrequest`/init deployment using `openvt -us`, this can result in passwordless `login -f root` on the spawned VT. This report establishes that privilege escalation path for that documented deployment; it does not claim equivalent reachability for deployments that do not use `openvt -u` from a privileged `kbrequest`/init path.SUSE information
Overall state of this security issue: Pending
This issue is currently rated as having important severity.
| CVSS detail | CNA (Red Hat) | SUSE |
|---|---|---|
| Base Score | 7.8 | 7.8 |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| Attack Vector | Local | Local |
| Attack Complexity | Low | Low |
| Privileges Required | Low | Low |
| User Interaction | None | None |
| Scope | Unchanged | Unchanged |
| Confidentiality Impact | High | High |
| Integrity Impact | High | High |
| Availability Impact | High | High |
| CVSSv3 Version | 3.1 | 3.1 |
| CVSS detail | SUSE |
|---|---|
| Base Score | 8.5 |
| Vector | CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |
| Attack Vector | Local |
| Attack Complexity | Low |
| Attack Requirements | None |
| Privileges Required | Low |
| User Interaction | None |
| Vulnerable System Confidentiality Impact | High |
| Vulnerable System Integrity Impact | High |
| Vulnerable System Availability Impact | High |
| Subsequent System Confidentiality Impact | None |
| Subsequent System Integrity Impact | None |
| Subsequent System Availability Impact | None |
| CVSSv4 Version | 4.0 |
SUSE Security Advisories:
- RHSA-2026:57597, published Sat Aug 22 15:06:56 UTC 2026
- RHSA-2026:57610, published Mon Aug 24 15:13:53 UTC 2026
List of released packages
| Product(s) | Fixed package version(s) | References |
|---|---|---|
| SUSE Liberty Linux 10 |
| Patchnames: RHSA-2026:57597 (x86_64) |
| SUSE Liberty Linux 9 |
| Patchnames: RHSA-2026:57610 (x86_64) |
Status of this issue by product and package
Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.
| Product(s) | Source package | State |
|---|---|---|
| Products under general support and receiving all security fixes. | ||
| SLES15-SP5-CHOST-BYOS-SAP-CCloud | kbd | Affected |
| SLES15-SP6-CHOST-BYOS | kbd | Affected |
| SLES15-SP6-CHOST-BYOS-Aliyun | kbd | Affected |
| SLES15-SP6-CHOST-BYOS-Azure | kbd | Affected |
| SLES15-SP6-CHOST-BYOS-EC2 | kbd | Affected |
| SLES15-SP6-CHOST-BYOS-GCE | kbd | Affected |
| SLES15-SP6-CHOST-BYOS-GDC | kbd | Affected |
| SLES15-SP6-CHOST-BYOS-SAP-CCloud | kbd | Affected |
| SLES15-SP7-CHOST-BYOS-Aliyun | kbd | Affected |
| SLES15-SP7-CHOST-BYOS-Azure | kbd | Affected |
| SLES15-SP7-CHOST-BYOS-EC2 | kbd | Affected |
| SLES15-SP7-CHOST-BYOS-GCE | kbd | Affected |
| SLES15-SP7-CHOST-BYOS-GDC | kbd | Affected |
| SLES15-SP7-CHOST-BYOS-SAP-CCloud | kbd | Affected |
| SUSE Linux Enterprise Desktop 15 SP7 | kbd | Affected |
| SUSE Linux Enterprise High Performance Computing 12 | kbd | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP7 | kbd | Affected |
| SUSE Linux Enterprise Micro 5.3 | kbd | Affected |
| SUSE Linux Enterprise Micro 5.4 | kbd | Affected |
| SUSE Linux Enterprise Micro 5.5 | kbd | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | kbd | Affected |
| SUSE Linux Enterprise Server 15 SP7 | kbd | Affected |
| SUSE Linux Enterprise Server 16.0 | kbd | Affected |
| SUSE Linux Enterprise Server 16.1 | kbd | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP7 | kbd | Affected |
| SUSE Linux Enterprise Server for SAP applications 16.0 | kbd | Affected |
| SUSE Linux Enterprise Server for SAP applications 16.1 | kbd | Affected |
| SUSE Linux Micro 6.0 | kbd | Affected |
| SUSE Linux Micro 6.1 | kbd | Affected |
| SUSE Linux Micro 6.2 | kbd | Affected |
| openSUSE Leap 16.0 | kbd | Affected |
| Products under Long Term Service Pack support and receiving important and critical security fixes. | ||
| SLES15-SP3-CHOST-BYOS-Aliyun | kbd | Affected |
| SLES15-SP3-CHOST-BYOS-Azure | kbd | Affected |
| SLES15-SP3-CHOST-BYOS-EC2 | kbd | Affected |
| SLES15-SP3-CHOST-BYOS-GCE | kbd | Affected |
| SLES15-SP3-CHOST-BYOS-SAP-CCloud | kbd | Affected |
| SLES15-SP4-CHOST-BYOS | kbd | Affected |
| SLES15-SP4-CHOST-BYOS-Aliyun | kbd | Affected |
| SLES15-SP4-CHOST-BYOS-Azure | kbd | Affected |
| SLES15-SP4-CHOST-BYOS-EC2 | kbd | Affected |
| SLES15-SP4-CHOST-BYOS-GCE | kbd | Affected |
| SLES15-SP4-CHOST-BYOS-SAP-CCloud | kbd | Affected |
| SLES15-SP5-CHOST-BYOS-Aliyun | kbd | Affected |
| SLES15-SP5-CHOST-BYOS-Azure | kbd | Affected |
| SLES15-SP5-CHOST-BYOS-EC2 | kbd | Affected |
| SLES15-SP5-CHOST-BYOS-GCE | kbd | Affected |
| SLES15-SP5-CHOST-BYOS-GDC | kbd | Affected |
| SUSE Linux Enterprise High Performance Computing 12 SP5 | kbd | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | kbd | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5 | kbd | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | kbd | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP4 | kbd | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP5 | kbd | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP6 | kbd | Affected |
| SUSE Linux Enterprise Server 12 SP5 | kbd | Affected |
| SUSE Linux Enterprise Server 12 SP5-LTSS | kbd | Affected |
| SUSE Linux Enterprise Server 12 SP5-LTSS Extended Security | kbd | Affected |
| SUSE Linux Enterprise Server 15 SP4 | kbd | Affected |
| SUSE Linux Enterprise Server 15 SP4-LTSS | kbd | Affected |
| SUSE Linux Enterprise Server 15 SP5 | kbd | Affected |
| SUSE Linux Enterprise Server 15 SP5-LTSS | kbd | Affected |
| SUSE Linux Enterprise Server 15 SP6 | kbd | Affected |
| SUSE Linux Enterprise Server 15 SP6-LTSS | kbd | Affected |
| SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 | kbd | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | kbd | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | kbd | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | kbd | Affected |
| SUSE Manager Proxy 4.3 | kbd | Affected |
| SUSE Manager Proxy LTS 4.3 | kbd | Affected |
| SUSE Manager Retail Branch Server 4.3 | kbd | Affected |
| SUSE Manager Retail Branch Server LTS 4.3 | kbd | Affected |
| SUSE Manager Server 4.3 | kbd | Affected |
| SUSE Manager Server LTS 4.3 | kbd | Affected |
| Products past their end of life and not receiving proactive updates anymore. | ||
| HPE Helion OpenStack 8 | kbd | Affected |
| SUSE CaaS Platform 3.0 | kbd | Affected |
| SUSE CaaS Platform 4.0 | kbd | Affected |
| SUSE Enterprise Storage 6 | kbd | Affected |
| SUSE Enterprise Storage 7 | kbd | Affected |
| SUSE Enterprise Storage 7.1 | kbd | Affected |
| SUSE Linux Enterprise Desktop 12 | kbd | Affected |
| SUSE Linux Enterprise Desktop 12 SP1 | kbd | Affected |
| SUSE Linux Enterprise Desktop 12 SP2 | kbd | Affected |
| SUSE Linux Enterprise Desktop 12 SP3 | kbd | Affected |
| SUSE Linux Enterprise Desktop 12 SP4 | kbd | Affected |
| SUSE Linux Enterprise Desktop 15 | kbd | Affected |
| SUSE Linux Enterprise Desktop 15 SP1 | kbd | Affected |
| SUSE Linux Enterprise Desktop 15 SP2 | kbd | Affected |
| SUSE Linux Enterprise Desktop 15 SP3 | kbd | Affected |
| SUSE Linux Enterprise Desktop 15 SP4 | kbd | Affected |
| SUSE Linux Enterprise Desktop 15 SP5 | kbd | Affected |
| SUSE Linux Enterprise Desktop 15 SP6 | kbd | Affected |
| SUSE Linux Enterprise High Performance Computing 12 SP1 | kbd | Affected |
| SUSE Linux Enterprise High Performance Computing 12 SP2 | kbd | Affected |
| SUSE Linux Enterprise High Performance Computing 12 SP3 | kbd | Affected |
| SUSE Linux Enterprise High Performance Computing 12 SP4 | kbd | Affected |
| SUSE Linux Enterprise High Performance Computing 15 | kbd | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1 | kbd | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1-ESPOS | kbd | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP1-LTSS | kbd | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2 | kbd | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2-ESPOS | kbd | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP2-LTSS | kbd | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3 | kbd | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-ESPOS | kbd | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS | kbd | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4 | kbd | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | kbd | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | kbd | Affected |
| SUSE Linux Enterprise High Performance Computing 15 SP6 | kbd | Affected |
| SUSE Linux Enterprise High Performance Computing 15-ESPOS | kbd | Affected |
| SUSE Linux Enterprise High Performance Computing 15-LTSS | kbd | Affected |
| SUSE Linux Enterprise Micro 5.0 | kbd | Affected |
| SUSE Linux Enterprise Micro 5.1 | kbd | Affected |
| SUSE Linux Enterprise Micro 5.2 | kbd | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 | kbd | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP1 | kbd | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP2 | kbd | Affected |
| SUSE Linux Enterprise Module for Basesystem 15 SP3 | kbd | Affected |
| SUSE Linux Enterprise Point of Sale 12 SP2-CLIENT | kbd | Affected |
| SUSE Linux Enterprise Real Time 15 SP2 | kbd | Affected |
| SUSE Linux Enterprise Real Time 15 SP3 | kbd | Affected |
| SUSE Linux Enterprise Real Time 15 SP4 | kbd | Affected |
| SUSE Linux Enterprise Server 12 | kbd | Affected |
| SUSE Linux Enterprise Server 12 SP1 | kbd | Affected |
| SUSE Linux Enterprise Server 12 SP1-LTSS | kbd | Affected |
| SUSE Linux Enterprise Server 12 SP2 | kbd | Affected |
| SUSE Linux Enterprise Server 12 SP2-BCL | kbd | Affected |
| SUSE Linux Enterprise Server 12 SP2-ESPOS | kbd | Affected |
| SUSE Linux Enterprise Server 12 SP2-LTSS | kbd | Affected |
| SUSE Linux Enterprise Server 12 SP3 | kbd | Affected |
| SUSE Linux Enterprise Server 12 SP3-BCL | kbd | Affected |
| SUSE Linux Enterprise Server 12 SP3-ESPOS | kbd | Affected |
| SUSE Linux Enterprise Server 12 SP3-LTSS | kbd | Affected |
| SUSE Linux Enterprise Server 12 SP4 | kbd | Affected |
| SUSE Linux Enterprise Server 12 SP4-ESPOS | kbd | Affected |
| SUSE Linux Enterprise Server 12 SP4-LTSS | kbd | Affected |
| SUSE Linux Enterprise Server 12-LTSS | kbd | Affected |
| SUSE Linux Enterprise Server 15 | kbd | Affected |
| SUSE Linux Enterprise Server 15 SP1 | kbd | Affected |
| SUSE Linux Enterprise Server 15 SP1-BCL | kbd | Affected |
| SUSE Linux Enterprise Server 15 SP1-LTSS | kbd | Affected |
| SUSE Linux Enterprise Server 15 SP2 | kbd | Affected |
| SUSE Linux Enterprise Server 15 SP2-BCL | kbd | Affected |
| SUSE Linux Enterprise Server 15 SP2-LTSS | kbd | Affected |
| SUSE Linux Enterprise Server 15 SP3 | kbd | Affected |
| SUSE Linux Enterprise Server 15 SP3-BCL | kbd | Affected |
| SUSE Linux Enterprise Server 15 SP3-LTSS | kbd | Affected |
| SUSE Linux Enterprise Server 15-LTSS | kbd | Affected |
| SUSE Linux Enterprise Server for Raspberry Pi 12 SP2 | kbd | Affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP1 | kbd | Affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP2 | kbd | Affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP3 | kbd | Affected |
| SUSE Linux Enterprise Server for SAP Applications 12 SP4 | kbd | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 | kbd | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP1 | kbd | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP2 | kbd | Affected |
| SUSE Linux Enterprise Server for SAP Applications 15 SP3 | kbd | Affected |
| SUSE Manager Proxy 4.0 | kbd | Affected |
| SUSE Manager Proxy 4.1 | kbd | Affected |
| SUSE Manager Proxy 4.2 | kbd | Affected |
| SUSE Manager Retail Branch Server 4.0 | kbd | Affected |
| SUSE Manager Retail Branch Server 4.1 | kbd | Affected |
| SUSE Manager Retail Branch Server 4.2 | kbd | Affected |
| SUSE Manager Server 4.0 | kbd | Affected |
| SUSE Manager Server 4.1 | kbd | Affected |
| SUSE Manager Server 4.2 | kbd | Affected |
| SUSE OpenStack Cloud 7 | kbd | Affected |
| SUSE OpenStack Cloud 8 | kbd | Affected |
| SUSE OpenStack Cloud 9 | kbd | Affected |
| SUSE OpenStack Cloud Crowbar 8 | kbd | Affected |
| SUSE OpenStack Cloud Crowbar 9 | kbd | Affected |
| openSUSE Leap 15.3 | kbd | Affected |
| openSUSE Leap 15.4 | kbd | Affected |
| openSUSE Leap 15.5 | kbd | Affected |
| openSUSE Leap 15.6 | kbd | Affected |
| openSUSE Leap Micro 5.2 | kbd | Affected |
| openSUSE Leap Micro 5.3 | kbd | Affected |
| openSUSE Leap Micro 5.4 | kbd | Affected |
| openSUSE Leap Micro 5.5 | kbd | Affected |
| Products at an unknown state of their lifecycle. | ||
| SLES-CHOST-BYOS-Aliyun | kbd | Affected |
| SLES-CHOST-BYOS-Azure | kbd | Affected |
| SLES-CHOST-BYOS-EC2 | kbd | Affected |
| SLES-CHOST-BYOS-GCE | kbd | Affected |
| SLES-CHOST-BYOS-GDC | kbd | Affected |
| SLES-CHOST-BYOS-SAP-CCloud | kbd | Affected |
| Container Status | ||
| bci/bci-init bci/bci-init:15.3 bci/bci-init:15.4 bci/bci-init:15.5 bci/bci-init:15.6 bci/kiwi kiwi-templates-Minimal kiwi-templates-Minimal-Cloud-sap kiwi-templates-Minimal-MS-HyperV-sap kiwi-templates-Minimal-VMware-sap kiwi-templates-Minimal-kvm-and-xen-sap rancher/elemental-builder-image/5.3 rancher/elemental-teal-iso/5.3 rancher/elemental-teal-iso/5.4 rancher/elemental-teal-rt/5.3 rancher/elemental-teal-rt/5.4 rancher/elemental-teal/5.3 rancher/elemental-teal/5.4 rancher/seedimage-builder ses/6/cephcsi/cephcsi ses/6/rook/ceph ses/7.1/ceph/haproxy ses/7.1/ceph/keepalived ses/7.1/cephcsi/cephcsi ses/7.1/rook/ceph ses/7/ceph/ceph ses/7/ceph/grafana ses/7/cephcsi/cephcsi ses/7/rook/ceph suse/hpc/warewulf4-x86_64/sle-hpc-node suse/kiosk/pulseaudio suse/kiosk/pulseaudio:17 suse/kiosk/tigervnc-x11vnc suse/kiosk/xorg suse/kiosk/xorg:21 suse/manager/4.3/proxy-httpd suse/manager/5.0/x86_64/proxy-httpd suse/manager/5.0/x86_64/server suse/manager/5.0/x86_64/server-hub-xmlrpc-api suse/multi-linux-manager/5.1/x86_64/proxy-httpd suse/multi-linux-manager/5.1/x86_64/proxy-salt-broker suse/multi-linux-manager/5.1/x86_64/server suse/multi-linux-manager/5.1/x86_64/server-hub-xmlrpc-api suse/multi-linux-manager/5.2/x86_64/server suse/multi-linux-manager/5.2/x86_64/server-hub-xmlrpc-api suse/pcp suse/pcp:5 suse/pcp:6 suse/postgres suse/postgres:10 suse/postgres:12 suse/postgres:13 suse/postgres:14 suse/sle-micro-rancher/5.2 suse/sle-micro-rancher/5.3 suse/sle-micro-rancher/5.4 suse/sle-micro/5.0/toolbox suse/sle-micro/5.5 suse/sle-micro/base-5.5 suse/sle-micro/kvm-5.5 suse/sle-micro/rt-5.5 suse/sles-16.1-kubevirt-minimal suse/sles/15.2/virt-handler:0.38.1 suse/sles/15.2/virt-launcher:0.38.1 suse/sles/15.3/libguestfs-tools:0.45.0 suse/sles/15.3/virt-handler:0.45.0 suse/sles/15.3/virt-launcher:0.45.0 suse/sles/15.4/cdi-importer:1.43.0 suse/sles/15.4/libguestfs-tools:0.49.0 suse/sles/15.4/virt-handler:0.49.0 suse/sles/15.4/virt-launcher:0.49.0 suse/sles/15.5/cdi-importer:1.55.0 suse/sles/15.5/libguestfs-tools:0.58.0 suse/sles/15.5/virt-handler:0.58.0 suse/sles/15.5/virt-launcher:0.58.0 suse/sles/15.6/libguestfs-tools:1.1.1 suse/sles/15.6/virt-handler:1.1.1 suse/sles/15.6/virt-launcher:1.1.1 suse/sles/15.7/libguestfs-tools:1.5.0 suse/sles/15.7/virt-handler:1.5.0 suse/sles/15.7/virt-launcher:1.5.0 third-party/nvidia/driver:550-sles15.7 third-party/nvidia/driver:550.163.01-sles15.7 third-party/nvidia/driver:570-sles15.7 third-party/nvidia/driver:570.195.03-sles15.7 third-party/nvidia/driver:570.211.01-sles15.7 third-party/nvidia/driver:575-sles15.7 third-party/nvidia/driver:575.57.08-sles15.7 third-party/nvidia/driver:580-sles15.7 third-party/nvidia/driver:580.105.08-sles15.7 third-party/nvidia/driver:580.126.09-sles15.7 third-party/nvidia/driver:580.126.16-sles15.7 third-party/nvidia/driver:580.126.20-sles15.7 third-party/nvidia/driver:580.82.07-sles15.7 third-party/nvidia/driver:580.95.05-sles15.7 third-party/nvidia/driver:590-sles15.7 third-party/nvidia/driver:590.48.01-sles15.7 third-party/nvidia/driver:595-sles15.7 third-party/nvidia/driver:595.45.04-sles15.7 third-party/nvidia/driver:595.58.03-sles15.7 trento/trento-db | kbd | Affected |
SUSE Timeline for this CVE
CVE page created: Mon Aug 17 21:37:29 2026CVE page last modified: Mon Aug 24 22:15:14 2026