kbd security update

An update is available for kbd. This update affects Rocky Linux 10. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the CVE list The kbd packages provide tools for managing console behavior on a Linux system,...

Moderate: Red Hat Security Advisory: kbd security update

An update for kbd is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the CV...

kbd: Local privilege escalation in openvt via incorrect process owner verification allowing passwordless root login

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 authenticateuser relies on stat"/proc//fd/0". stat on /proc//fd/0 follows the symlink to the underlying TTY...

Moderate: kbd security update

The kbd packages provide tools for managing console behavior on a Linux system, including the keyboard, screen fonts, virtual terminals, and font files. Security Fixes: kbd: Local privilege escalation in openvt via incorrect process owner verification allowing passwordless root login CVE-2026-726...

CVE-2026-72693

CVE-2026-72693 describes a privilege-escalation path in deployments using openvt -u with kbrequest/init. The root cause is an ownership check in authenticate_user() that uses stat("/proc//fd/0"), which follows the fd to the TTY node and reports the TTY owner instead of the process owner. If the T...