CVE-2025-40070
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: pps: fix warning in pps_register_cdev when register device fail Similar to previous commit 2a934fdb01db ("media: v4l2-dev: fix error handling in __video_register_device()"), the release hook should be set before device_register(). Otherwise, when device_register() return error and put_device() try to callback the release function, the below warning may happen. ------------[ cut here ]------------ WARNING: CPU: 1 PID: 4760 at drivers/base/core.c:2567 device_release+0x1bd/0x240 drivers/base/core.c:2567 Modules linked in: CPU: 1 UID: 0 PID: 4760 Comm: syz.4.914 Not tainted 6.17.0-rc3+ #1 NONE RIP: 0010:device_release+0x1bd/0x240 drivers/base/core.c:2567 Call Trace: <TASK> kobject_cleanup+0x136/0x410 lib/kobject.c:689 kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0xe9/0x130 lib/kobject.c:737 put_device+0x24/0x30 drivers/base/core.c:3797 pps_register_cdev+0x2da/0x370 drivers/pps/pps.c:402 pps_register_source+0x2f6/0x480 drivers/pps/kapi.c:108 pps_tty_open+0x190/0x310 drivers/pps/clients/pps-ldisc.c:57 tty_ldisc_open+0xa7/0x120 drivers/tty/tty_ldisc.c:432 tty_set_ldisc+0x333/0x780 drivers/tty/tty_ldisc.c:563 tiocsetd drivers/tty/tty_io.c:2429 [inline] tty_ioctl+0x5d1/0x1700 drivers/tty/tty_io.c:2728 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:598 [inline] __se_sys_ioctl fs/ioctl.c:584 [inline] __x64_sys_ioctl+0x194/0x210 fs/ioctl.c:584 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x5f/0x2a0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x76/0x7e </TASK> Before commit c79a39dc8d06 ("pps: Fix a use-after-free"), pps_register_cdev() call device_create() to create pps->dev, which will init dev->release to device_create_release(). Now the comment is outdated, just remove it. Thanks for the reminder from Calvin Owens, 'kfree_pps' should be removed in pps_register_source() to avoid a double free in the failure case.
Severity
Not scored
CVSS score
Not available
Vulnerability status
Deferred
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2025-10-28 12:15:41.493000
Last modified
2026-10-19 21:10:00.160000
View original CVE JSON
{
"id": "CVE-2025-40070",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2025-10-28T12:15:41.493",
"lastModified": "2026-10-19T21:10:00.160",
"vulnStatus": "Deferred",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\npps: fix warning in pps_register_cdev when register device fail\n\nSimilar to previous commit 2a934fdb01db (\"media: v4l2-dev: fix error\nhandling in __video_register_device()\"), the release hook should be set\nbefore device_register(). Otherwise, when device_register() return error\nand put_device() try to callback the release function, the below warning\nmay happen.\n\n ------------[ cut here ]------------\n WARNING: CPU: 1 PID: 4760 at drivers/base/core.c:2567 device_release+0x1bd/0x240 drivers/base/core.c:2567\n Modules linked in:\n CPU: 1 UID: 0 PID: 4760 Comm: syz.4.914 Not tainted 6.17.0-rc3+ #1 NONE\n RIP: 0010:device_release+0x1bd/0x240 drivers/base/core.c:2567\n Call Trace:\n <TASK>\n kobject_cleanup+0x136/0x410 lib/kobject.c:689\n kobject_release lib/kobject.c:720 [inline]\n kref_put include/linux/kref.h:65 [inline]\n kobject_put+0xe9/0x130 lib/kobject.c:737\n put_device+0x24/0x30 drivers/base/core.c:3797\n pps_register_cdev+0x2da/0x370 drivers/pps/pps.c:402\n pps_register_source+0x2f6/0x480 drivers/pps/kapi.c:108\n pps_tty_open+0x190/0x310 drivers/pps/clients/pps-ldisc.c:57\n tty_ldisc_open+0xa7/0x120 drivers/tty/tty_ldisc.c:432\n tty_set_ldisc+0x333/0x780 drivers/tty/tty_ldisc.c:563\n tiocsetd drivers/tty/tty_io.c:2429 [inline]\n tty_ioctl+0x5d1/0x1700 drivers/tty/tty_io.c:2728\n vfs_ioctl fs/ioctl.c:51 [inline]\n __do_sys_ioctl fs/ioctl.c:598 [inline]\n __se_sys_ioctl fs/ioctl.c:584 [inline]\n __x64_sys_ioctl+0x194/0x210 fs/ioctl.c:584\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0x5f/0x2a0 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\n </TASK>\n\nBefore commit c79a39dc8d06 (\"pps: Fix a use-after-free\"),\npps_register_cdev() call device_create() to create pps->dev, which will\ninit dev->release to device_create_release(). Now the comment is outdated,\njust remove it.\n\nThanks for the reminder from Calvin Owens, 'kfree_pps' should be removed\nin pps_register_source() to avoid a double free in the failure case."
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\npps: corregir advertencia en pps_register_cdev cuando el registro del dispositivo falla\n\nSimilar al commit anterior 2a934fdb01db ('media: v4l2-dev: corregir el manejo de errores en __video_register_device()'), el hook de liberación debería establecerse antes de device_register(). De lo contrario, cuando device_register() devuelve un error y put_device() intenta llamar a la función de liberación, la siguiente advertencia puede ocurrir.\n\n ------------[ cut here ]------------\n WARNING: CPU: 1 PID: 4760 at drivers/base/core.c:2567 device_release+0x1bd/0x240 drivers/base/core.c:2567\n Modules linked in:\n CPU: 1 UID: 0 PID: 4760 Comm: syz.4.914 Not tainted 6.17.0-rc3+ #1 NONE\n RIP: 0010:device_release+0x1bd/0x240 drivers/base/core.c:2567\n Call Trace:\n <TASK>\n kobject_cleanup+0x136/0x410 lib/kobject.c:689\n kobject_release lib/kobject.c:720 [inline]\n kref_put include/linux/kref.h:65 [inline]\n kobject_put+0xe9/0x130 lib/kobject.c:737\n put_device+0x24/0x30 drivers/base/core.c:3797\n pps_register_cdev+0x2da/0x370 drivers/pps/pps.c:402\n pps_register_source+0x2f6/0x480 drivers/pps/kapi.c:108\n pps_tty_open+0x190/0x310 drivers/pps/clients/pps-ldisc.c:57\n tty_ldisc_open+0xa7/0x120 drivers/tty/tty_ldisc.c:432\n tty_set_ldisc+0x333/0x780 drivers/tty/tty_ldisc.c:563\n tiocsetd drivers/tty/tty_io.c:2429 [inline]\n tty_ioctl+0x5d1/0x1700 drivers/tty/tty_io.c:2728\n vfs_ioctl fs/ioctl.c:51 [inline]\n __do_sys_ioctl fs/ioctl.c:598 [inline]\n __se_sys_ioctl fs/ioctl.c:584 [inline]\n __x64_sys_ioctl+0x194/0x210 fs/ioctl.c:584\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0x5f/0x2a0 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\n </TASK>\n\nAntes del commit c79a39dc8d06 ('pps: Corregir un uso después de liberación'), pps_register_cdev() llama a device_create() para crear pps->dev, lo que inicializará dev->release a device_create_release(). Ahora el comentario está obsoleto, simplemente elimínelo.\n\nGracias por el recordatorio de Calvin Owens, 'kfree_pps' debería eliminarse en pps_register_source() para evitar una doble liberación en el caso de fallo."
}
],
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
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"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"drivers/pps/kapi.c",
"drivers/pps/pps.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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},
{
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"versionType": "git",
"status": "affected"
},
{
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"versionType": "git",
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},
{
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},
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"versionType": "git",
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{
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"versionType": "git",
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},
{
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"versionType": "git",
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},
{
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{
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"versionType": "git",
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},
{
"version": "5.4.291",
"lessThan": "5.4.301",
"versionType": "semver",
"status": "affected"
},
{
"version": "5.10.235",
"lessThan": "5.10.246",
"versionType": "semver",
"status": "affected"
},
{
"version": "5.15.179",
"lessThan": "5.15.195",
"versionType": "semver",
"status": "affected"
},
{
"version": "6.1.129",
"lessThan": "6.1.156",
"versionType": "semver",
"status": "affected"
},
{
"version": "6.6.76",
"lessThan": "6.6.112",
"versionType": "semver",
"status": "affected"
},
{
"version": "6.12.13",
"lessThan": "6.12.53",
"versionType": "semver",
"status": "affected"
},
{
"version": "6.13.2",
"lessThan": "6.14",
"versionType": "semver",
"status": "affected"
}
]
},
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "affected",
"programFiles": [
"drivers/pps/kapi.c",
"drivers/pps/pps.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "6.14",
"status": "affected"
},
{
"version": "0",
"lessThan": "6.14",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "5.4.301",
"lessThanOrEqual": "5.4.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "5.10.246",
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"versionType": "semver",
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},
{
"version": "5.15.195",
"lessThanOrEqual": "5.15.*",
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},
{
"version": "6.1.156",
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"versionType": "semver",
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},
{
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"versionType": "semver",
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},
{
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},
{
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"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
"status": "unaffected"
}
]
}
]
},
{
"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
"affectedData": [
{
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"defaultStatus": "unknown",
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{
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"lessThan": "*",
"versionType": "custom",
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}
]
},
{
"vendor": "Siemens",
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"defaultStatus": "unknown",
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{
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"lessThan": "*",
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"status": "affected"
}
]
},
{
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}
]
},
{
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{
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]
},
{
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{
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"lessThan": "*",
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}
]
},
{
"vendor": "Siemens",
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{
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"status": "affected"
}
]
},
{
"vendor": "Siemens",
"product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP",
"defaultStatus": "unknown",
"versions": [
{
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"lessThan": "*",
"versionType": "custom",
"status": "affected"
}
]
},
{
"vendor": "Siemens",
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{
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"lessThan": "*",
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}
]
},
{
"vendor": "Siemens",
"product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP",
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]
},
{
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"product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP",
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"lessThan": "*",
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}
]
}
]
}
],
"metrics": {},
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}