util-linux: util-linux: nsenter --join-cgroup leaks root cgroup migration authority

The nsenter --join-cgroup option opens the target cgroup.procs file as root and leaves that file descriptor open across later namespace and credential changes and across execve. Because the kernel checks later cgroup migrations using the credentials from the original open, a program run in an...

ALPINE-CVE-2026-78408

The nsenter --join-cgroup option opens the target cgroup.procs file as root and leaves that file descriptor open across later namespace and credential changes and across execve. Because the kernel checks later cgroup migrations using the credentials from the original open, a program run in an...

CVE-2026-78408

The nsenter --join-cgroup option opens the target cgroup.procs file as root and leaves that file descriptor open across later namespace and credential changes and across execve. Because the kernel checks later cgroup migrations using the credentials from the original open, a program run in an...

AZL-99393 CVE-2026-78408 affecting package util-linux 2.40.2-5

The nsenter --join-cgroup option opens the target cgroup.procs file as root and leaves that file descriptor open across later namespace and credential changes and across execve. Because the kernel checks later cgroup migrations using the credentials from the original open, a program run in an...

DEBIAN-CVE-2026-78408

The nsenter --join-cgroup option opens the target cgroup.procs file as root and leaves that file descriptor open across later namespace and credential changes and across execve. Because the kernel checks later cgroup migrations using the credentials from the original open, a program run in an...

EUVD-2026-70105

The nsenter --join-cgroup option opens the target cgroup.procs file as root and leaves that file descriptor open across later namespace and credential changes and across execve. Because the kernel checks later cgroup migrations using the credentials from the original open, a program run in an...

CVE-2026-78408

The nsenter --join-cgroup option opens the target cgroup.procs file as root and leaves that file descriptor open across later namespace and credential changes and across execve. Because the kernel checks later cgroup migrations using the credentials from the original open, a program run in an...

CVE-2026-78408 Util-linux: util-linux: nsenter --join-cgroup leaks root cgroup migration authority

The nsenter --join-cgroup option opens the target cgroup.procs file as root and leaves that file descriptor open across later namespace and credential changes and across execve. Because the kernel checks later cgroup migrations using the credentials from the original open, a program run in an...

CVE-2026-78408

The nsenter --join-cgroup option opens the target cgroup.procs file as root and leaves that file descriptor open across later namespace and credential changes and across execve. Because the kernel checks later cgroup migrations using the credentials from the original open, a program run in an...

CVE-2026-78408

util-linux nsenter --join-cgroup opens the target cgroup.procs file as root and leaves the file descriptor open across subsequent namespace, credential, and execve() transitions. Because the kernel evaluates later cgroup migrations against the credentials of the original open, a process in an att...

CVE-2026-78408

The nsenter --join-cgroup option opens the target cgroup.procs file as root and leaves that file descriptor open across later namespace and credential changes and across execve. Because the kernel checks later cgroup migrations using the credentials from the original open, a program run in an...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: cgroup: Use separate source/destination nodes when preloading csssets for migration. Each cssset is associated with its corresponding tasks. When moving tasks between csssets during a migration, we need to keep the source and...

UBUNTU-CVE-2026-53328

In the Linux kernel, the following vulnerability has been resolved: schedext: Don't warn on NULL cgrpmovingfrom in scxcgroupmovetask A WARN fires when systemd's user manager writes "+cpu +memory +pids" to its own subtreecontrol while a schedext scheduler is loaded: WARNING: at...

EUVD-2026-40962

In the Linux kernel, the following vulnerability has been resolved: schedext: Don't warn on NULL cgrpmovingfrom in scxcgroupmovetask A WARN fires when systemd's user manager writes "+cpu +memory +pids" to its own subtreecontrol while a schedext scheduler is loaded: WARNING: at...

CVE-2026-53328

In the Linux kernel, the following vulnerability has been resolved: schedext: Don't warn on NULL cgrpmovingfrom in scxcgroupmovetask A WARN fires when systemd's user manager writes "+cpu +memory +pids" to its own subtreecontrol while a schedext scheduler is loaded: WARNING: at...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: mm: multi-gen LRU: fix crash during cgroup migration The lrugenmigratemm function assumes that lrugenaddmm runs before it. This assumption is not true in the following scenario: CPU 1 CPU 2 clone cgroupcanfork cgroupprocswrite...

CVE-2026-43439

In the Linux kernel, the following vulnerability has been resolved: cgroup: fix race between task migration and iteration When a task is migrated out of a cssset, cgroupmigrateaddtask first moves it from cset-tasks to cset-mgtasks via: listmovetail&task-;cglist, &cset-;mgtasks; If a csstaskiter...

kernel: sched_ext: Fix incorrect autogroup migration detection

In the Linux kernel, the following vulnerability has been resolved: schedext: Fix incorrect autogroup migration detection scxmovetask is called from schedmovetask and tells the BPF scheduler that cgroup migration is being committed. schedmovetask is used by both cgroup and autogroup migrations an...

Unity Linux 20.1070a Security Update: kernel (UTSA-2025-989827)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2025-989827 advisory. In the Linux kernel, the following vulnerability has been resolved: cgroup: Use separate src/dst nodes when preloading csssets for migration Each cset cssset is pinn...

Unity Linux 20.1070e Security Update: kernel (UTSA-2025-987252)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2025-987252 advisory. In the Linux kernel, the following vulnerability has been resolved: cgroup: Use separate src/dst nodes when preloading csssets for migration Each cset cssset is pinn...