CVE-2026-53314

Descrição

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