CVE-2026-53328

In the Linux kernel, the following vulnerability has been resolved: sched_ext: Don't warn on NULL cgrp_moving_from in scx_cgroup_move_task() A WARN fires when systemd's user manager writes "+cpu +memory +pids" to its own subtree_control while a sched_ext scheduler is loaded: WARNING: at kernel/sched/ext.c:3227 scx_cgroup_move_task+0xa8/0xb0 scx_cgroup_move_task+0xa8/0xb0 sched_move_task+0x134/0x290 cpu_cgroup_attach+0x39/0x70 cgroup_migrate_execute+0x37d/0x450 cgroup_update_dfl_csses+0x1e3/0x270 cgroup_subtree_control_write+0x3e7/0x440 scx_cgroup_can_attach() arms cgrp_moving_from only when a task's cpu cgroup changes. It can still be NULL when scx_cgroup_move_task() runs, through this sequence: Step Result --------------------------------- ---------------------------------- 1. cpu enabled on cgroup G cpu css = A 2. cpu toggled off then on for G A killed, B created (same cgroup) 3. an exiting task keeps A alive migration skips it, A now stale 4. +memory migrates G stale A vs current B pulls cpu in 5. cpu attach runs for all tasks hits a live, cpu-unchanged task 6. scx_cgroup_move_task() on it cgrp_moving_from NULL -> WARN The mismatch is that scx_cgroup_can_attach() keys on cgroup identity while migration drives the move on css identity, so a NULL cgrp_moving_from here is a legitimate css-only migration, not a missing prep. The call is already gated on cgrp_moving_from, so just drop the warning. ops.cgroup_prep_move() and ops.cgroup_move() stay paired.

• https://git.kernel.org/stable/c/02e545c4297a26dbbc41df81b831e7f605bcd306Patch
• https://git.kernel.org/stable/c/0ffcad63b19a1cadb475c9f405a93607fdcd0d7cPatch
• https://git.kernel.org/stable/c/bc75f5951fac4e49d175c4433fc08fb1ec01172fPatch
• https://git.kernel.org/stable/c/cdff2eb97be147d2ce52ac1327841068781f25dcPatch

Published

Jul 1, 2026

Last Modified

Jul 23, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-53322In the Linux kernel, the following vulnerability has been re…8.8
• CVE-2026-53323In the Linux kernel, the following vulnerability has been re…5.5
• CVE-2026-53324In the Linux kernel, the following vulnerability has been re…5.5
• CVE-2026-53325In the Linux kernel, the following vulnerability has been re…5.5
• CVE-2026-53326In the Linux kernel, the following vulnerability has been re…5.5
• CVE-2026-53327In the Linux kernel, the following vulnerability has been re…5.5
• CVE-2026-53329In the Linux kernel, the following vulnerability has been re…7
• CVE-2026-5333A security flaw has been discovered in DefaultFuction Conten…9.8
• CVE-2026-53330In the Linux kernel, the following vulnerability has been re…7.1
• CVE-2026-53331In the Linux kernel, the following vulnerability has been re…5.5
• CVE-2026-53332In the Linux kernel, the following vulnerability has been re…5.5
• CVE-2026-53333In the Linux kernel, the following vulnerability has been re…5.5