{"id":"CVE-2026-43409","summary":"kprobes: avoid crash when rmmod/insmod after ftrace killed","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nkprobes: avoid crash when rmmod/insmod after ftrace killed\n\nAfter we hit ftrace is killed by some errors, the kernel crash if\nwe remove modules in which kprobe probes.\n\nBUG: unable to handle page fault for address: fffffbfff805000d\nPGD 817fcc067 P4D 817fcc067 PUD 817fc8067 PMD 101555067 PTE 0\nOops: Oops: 0000 [#1] SMP KASAN PTI\nCPU: 4 UID: 0 PID: 2012 Comm: rmmod Tainted: G        W  OE\nTainted: [W]=WARN, [O]=OOT_MODULE, [E]=UNSIGNED_MODULE\nRIP: 0010:kprobes_module_callback+0x89/0x790\nRSP: 0018:ffff88812e157d30 EFLAGS: 00010a02\nRAX: 1ffffffff805000d RBX: dffffc0000000000 RCX: ffffffff86a8de90\nRDX: ffffed1025c2af9b RSI: 0000000000000008 RDI: ffffffffc0280068\nRBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1025c2af9a\nR10: ffff88812e157cd7 R11: 205d323130325420 R12: 0000000000000002\nR13: ffffffffc0290488 R14: 0000000000000002 R15: ffffffffc0280040\nFS:  00007fbc450dd740(0000) GS:ffff888420331000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: fffffbfff805000d CR3: 000000010f624000 CR4: 00000000000006f0\nCall Trace:\n \u003cTASK\u003e\n notifier_call_chain+0xc6/0x280\n blocking_notifier_call_chain+0x60/0x90\n __do_sys_delete_module.constprop.0+0x32a/0x4e0\n do_syscall_64+0x5d/0xfa0\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\nThis is because the kprobe on ftrace does not correctly handles\nthe kprobe_ftrace_disabled flag set by ftrace_kill().\n\nTo prevent this error, check kprobe_ftrace_disabled in\n__disarm_kprobe_ftrace() and skip all ftrace related operations.","modified":"2026-07-11T03:54:32.189527507Z","published":"2026-05-08T14:21:48.239Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43409.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/8b6767e4141b2a42745b544d4555cf1614ba1a2d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9edc79d664832a842012ad105b1521c1a3c35ab3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b0ca81616a010807e91fc31db9be242b96326adc"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cae928e3178c75602c21d67e21255d73e7e9ed4f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e113f0b46d19626ec15388bcb91432c9a4fd6261"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43409.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43409"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"ae6aa16fdc163afe6b04b6c073ad4ddd4663c03b"},{"fixed":"8b6767e4141b2a42745b544d4555cf1614ba1a2d"},{"fixed":"b0ca81616a010807e91fc31db9be242b96326adc"},{"fixed":"cae928e3178c75602c21d67e21255d73e7e9ed4f"},{"fixed":"9edc79d664832a842012ad105b1521c1a3c35ab3"},{"fixed":"e113f0b46d19626ec15388bcb91432c9a4fd6261"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-43409.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.7.0"},{"fixed":"6.6.130"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.78"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.19"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"6.19.9"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-43409.json"}}],"schema_version":"1.7.5"}