CVE-2026-43409

*** Pendiente de traducción *** In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> kprobes: avoid crash when rmmod/insmod after ftrace killed<br /> <br /> After we hit ftrace is killed by some errors, the kernel crash if<br /> we remove modules in which kprobe probes.<br /> <br /> BUG: unable to handle page fault for address: fffffbfff805000d<br /> PGD 817fcc067 P4D 817fcc067 PUD 817fc8067 PMD 101555067 PTE 0<br /> Oops: Oops: 0000 [#1] SMP KASAN PTI<br /> CPU: 4 UID: 0 PID: 2012 Comm: rmmod Tainted: G W OE<br /> Tainted: [W]=WARN, [O]=OOT_MODULE, [E]=UNSIGNED_MODULE<br /> RIP: 0010:kprobes_module_callback+0x89/0x790<br /> RSP: 0018:ffff88812e157d30 EFLAGS: 00010a02<br /> RAX: 1ffffffff805000d RBX: dffffc0000000000 RCX: ffffffff86a8de90<br /> RDX: ffffed1025c2af9b RSI: 0000000000000008 RDI: ffffffffc0280068<br /> RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1025c2af9a<br /> R10: ffff88812e157cd7 R11: 205d323130325420 R12: 0000000000000002<br /> R13: ffffffffc0290488 R14: 0000000000000002 R15: ffffffffc0280040<br /> FS: 00007fbc450dd740(0000) GS:ffff888420331000(0000) knlGS:0000000000000000<br /> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033<br /> CR2: fffffbfff805000d CR3: 000000010f624000 CR4: 00000000000006f0<br /> Call Trace:<br /> <br /> notifier_call_chain+0xc6/0x280<br /> blocking_notifier_call_chain+0x60/0x90<br /> __do_sys_delete_module.constprop.0+0x32a/0x4e0<br /> do_syscall_64+0x5d/0xfa0<br /> entry_SYSCALL_64_after_hwframe+0x76/0x7e<br /> <br /> This is because the kprobe on ftrace does not correctly handles<br /> the kprobe_ftrace_disabled flag set by ftrace_kill().<br /> <br /> To prevent this error, check kprobe_ftrace_disabled in<br /> __disarm_kprobe_ftrace() and skip all ftrace related operations.