CVE-2026-43409
Estado: AnalizadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
kprobes: avoid crash when rmmod/insmod after ftrace killed
After we hit ftrace is killed by some errors, the kernel crash if we remove modules in which kprobe probes.
This is because the kprobe on ftrace does not correctly handles the kprobe_ftrace_disabled flag set by ftrace_kill().
To prevent this error, check kprobe_ftrace_disabled in __disarm_kprobe_ftrace() and skip all ftrace related operations.
Detalles técnicos trazas, registros y código del informe original
BUG: unable to handle page fault for address: fffffbfff805000d PGD 817fcc067 P4D 817fcc067 PUD 817fc8067 PMD 101555067 PTE 0 Oops: Oops: 0000 [#1] SMP KASAN PTI CPU: 4 UID: 0 PID: 2012 Comm: rmmod Tainted: G W OE Tainted: [W]=WARN, [O]=OOT_MODULE, [E]=UNSIGNED_MODULE RIP: 0010:kprobes_module_callback+0x89/0x790 RSP: 0018:ffff88812e157d30 EFLAGS: 00010a02 RAX: 1ffffffff805000d RBX: dffffc0000000000 RCX: ffffffff86a8de90 RDX: ffffed1025c2af9b RSI: 0000000000000008 RDI: ffffffffc0280068 RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1025c2af9a R10: ffff88812e157cd7 R11: 205d323130325420 R12: 0000000000000002 R13: ffffffffc0290488 R14: 0000000000000002 R15: ffffffffc0280040 FS: 00007fbc450dd740(0000) GS:ffff888420331000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffffbfff805000d CR3: 000000010f624000 CR4: 00000000000006f0 Call Trace: <TASK> notifier_call_chain+0xc6/0x280 blocking_notifier_call_chain+0x60/0x90 __do_sys_delete_module.constprop.0+0x32a/0x4e0 do_syscall_64+0x5d/0xfa0 entry_SYSCALL_64_after_hwframe+0x76/0x7e
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 5.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.16%
- Percentil entre todas las CVEs puntuadas: 5
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
CWE
- CWE-476
Referencias
- https://git.kernel.org/stable/c/8b6767e4141b2a42745b544d4555cf1614ba1a2d
- https://git.kernel.org/stable/c/9edc79d664832a842012ad105b1521c1a3c35ab3
- https://git.kernel.org/stable/c/b0ca81616a010807e91fc31db9be242b96326adc
- https://git.kernel.org/stable/c/cae928e3178c75602c21d67e21255d73e7e9ed4f
- https://git.kernel.org/stable/c/e113f0b46d19626ec15388bcb91432c9a4fd6261
JSON original (NVD)
Mostrar
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"cveTags": [],
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"source": "nvd@nist.gov",
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"version": "3.1",
"baseScore": 5.5,
"attackVector": "LOCAL",
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"integrityImpact": "NONE",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "LOW",
"confidentialityImpact": "NONE"
},
"impactScore": 3.6,
"exploitabilityScore": 1.8
}
]
},
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"published": "2026-05-08T15:16:52.513",
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"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "CWE-476"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "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 <TASK>\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."
}
],
"lastModified": "2026-06-17T10:49:32.557",
"configurations": [
{
"nodes": [
{
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}