CVE-2026-53314

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> padata: Put CPU offline callback in ONLINE section to allow failure<br /> <br /> syzbot reported the following warning:<br /> <br /> DEAD callback error for CPU1<br /> WARNING: kernel/cpu.c:1463 at _cpu_down+0x759/0x1020 kernel/cpu.c:1463, CPU#0: syz.0.1960/14614<br /> <br /> at commit 4ae12d8bd9a8 ("Merge tag &amp;#39;kbuild-fixes-7.0-2&amp;#39; of git://git.kernel.org/pub/scm/linux/kernel/git/kbuild/linux")<br /> which tglx traced to padata_cpu_dead() given it&amp;#39;s the only<br /> sub-CPUHP_TEARDOWN_CPU callback that returns an error.<br /> <br /> Failure isn&amp;#39;t allowed in hotplug states before CPUHP_TEARDOWN_CPU<br /> so move the CPU offline callback to the ONLINE section where failure is<br /> possible.