CVE-2025-39829
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: trace/fgraph: Fix the warning caused by missing unregister notifier This warning was triggered during testing on v6.16: notifier callback ftrace_suspend_notifier_call already registered WARNING: CPU: 2 PID: 86 at kernel/notifier.c:23 notifier_chain_register+0x44/0xb0 ... Call Trace: <TASK> blocking_notifier_chain_register+0x34/0x60 register_ftrace_graph+0x330/0x410 ftrace_profile_write+0x1e9/0x340 vfs_write+0xf8/0x420 ? filp_flush+0x8a/0xa0 ? filp_close+0x1f/0x30 ? do_dup2+0xaf/0x160 ksys_write+0x65/0xe0 do_syscall_64+0xa4/0x260 entry_SYSCALL_64_after_hwframe+0x77/0x7f When writing to the function_profile_enabled interface, the notifier was not unregistered after start_graph_tracing failed, causing a warning the next time function_profile_enabled was written. Fixed by adding unregister_pm_notifier in the exception path.
Severity
MEDIUM
CVSS score
5.5
(v3.1)
Vulnerability status
Modified
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2025-09-16 13:16:03.887000
Last modified
2026-10-30 13:18:10.100000
View original CVE JSON
{
"id": "CVE-2025-39829",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2025-09-16T13:16:03.887",
"lastModified": "2026-10-30T13:18:10.100",
"vulnStatus": "Modified",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntrace/fgraph: Fix the warning caused by missing unregister notifier\n\nThis warning was triggered during testing on v6.16:\n\nnotifier callback ftrace_suspend_notifier_call already registered\nWARNING: CPU: 2 PID: 86 at kernel/notifier.c:23 notifier_chain_register+0x44/0xb0\n...\nCall Trace:\n <TASK>\n blocking_notifier_chain_register+0x34/0x60\n register_ftrace_graph+0x330/0x410\n ftrace_profile_write+0x1e9/0x340\n vfs_write+0xf8/0x420\n ? filp_flush+0x8a/0xa0\n ? filp_close+0x1f/0x30\n ? do_dup2+0xaf/0x160\n ksys_write+0x65/0xe0\n do_syscall_64+0xa4/0x260\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nWhen writing to the function_profile_enabled interface, the notifier was\nnot unregistered after start_graph_tracing failed, causing a warning the\nnext time function_profile_enabled was written.\n\nFixed by adding unregister_pm_notifier in the exception path."
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ntrace/fgraph: Se corrige la advertencia causada por la falta de anulación de registro del notificador\n\nEsta advertencia se activó durante las pruebas en la v6.16:\n\nfunción de devolución de llamada del notificador ftrace_suspend_notifier_call ya registrada\nADVERTENCIA: CPU: 2 PID: 86 en kernel/notifier.c:23 notifier_chain_register+0x44/0xb0\n...\nTraza de Llamada:\n <TAREA>\n blocking_notifier_chain_register+0x34/0x60\n register_ftrace_graph+0x330/0x410\n ftrace_profile_write+0x1e9/0x340\n vfs_write+0xf8/0x420\n ? filp_flush+0x8a/0xa0\n ? filp_close+0x1f/0x30\n ? do_dup2+0xaf/0x160\n ksys_write+0x65/0xe0\n do_syscall_64+0xa4/0x260\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nAl escribir en la interfaz function_profile_enabled, no se anuló el registro del notificador después de que start_graph_tracing fallara, causando una advertencia la próxima vez que se escribiera en function_profile_enabled.\n\nCorregido añadiendo unregister_pm_notifier en la ruta de excepción."
}
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"programFiles": [
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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}
],
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"source": "[email protected]",
"type": "Primary",
"cvssData": {
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"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"attackVector": "LOCAL",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "NONE",
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"availabilityImpact": "HIGH"
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{
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"ssvcData": {
"timestamp": "2026-01-14T18:17:20.629374Z",
"id": "CVE-2025-39829",
"options": [
{
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},
{
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{
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],
"role": "CISA Coordinator",
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}
}
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},
"weaknesses": [
{
"source": "[email protected]",
"type": "Primary",
"description": [
{
"lang": "en",
"value": "NVD-CWE-noinfo"
}
]
}
],
"configurations": [
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