CVE-2025-68282
In the Linux kernel, the following vulnerability has been resolved:
usb: gadget: udc: fix use-after-free in usb_gadget_state_work
A race condition during gadget teardown can lead to a use-after-free in usb_gadget_state_work(), as reported by KASAN:
The fundamental race occurs because a concurrent event (e.g., an interrupt) can call usb_gadget_set_state() and schedule gadget->work at any time during the cleanup process in usb_del_gadget().
Commit 399a45e5237c ("usb: gadget: core: flush gadget workqueue after device removal") attempted to fix this by moving flush_work() to after device_del().
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However, this does not fully solve the race, as a new work item can still be scheduled *after* flush_work() completes but before the gadget's memory is freed, leading to the same use-after-free.
This patch fixes the race condition robustly by introducing a 'teardown' flag and a 'state_lock' spinlock to the usb_gadget struct. The flag is set during cleanup in usb_del_gadget() *before* calling flush_work() to prevent any new work from being scheduled once cleanup has commenced. The scheduling site, usb_gadget_set_state(), now checks this flag under the lock before queueing the work, thus safely closing the race window.
Detalles técnicos trazas, registros y código del informe original
BUG: KASAN: invalid-access in sysfs_notify+0x2c/0xd0 Workqueue: events usb_gadget_state_work
CVSS
NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.21%
- Percentil entre todas las CVEs puntuadas: 9
- Fecha de la puntuación: 5/10/2026
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)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
Referencias
- https://git.kernel.org/stable/c/10014310193cf6736c1aeb4105c5f4a0818d0c65
- https://git.kernel.org/stable/c/3b32caa73d135eea8fb9cabb45e9fc64c5a3ecb9
- https://git.kernel.org/stable/c/baeb66fbd4201d1c4325074e78b1f557dff89b5b
- https://git.kernel.org/stable/c/c12a0c3ef815ddd67e47f9c819f9fe822fed5467
- https://git.kernel.org/stable/c/dddc944d65169b552e09cb54e3ed4fbb9ea26416
- https://git.kernel.org/stable/c/eee16f3ff08e759ea828bdf7dc1c0ef2f22134f5
- https://git.kernel.org/stable/c/f02a412c0a18f02f0f91b0a3d9788315a721b7fd
JSON original (NVD)
Mostrar
{
"id": "CVE-2025-68282",
"cveTags": [],
"metrics": {},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5702f75375aa9ecf8ad3431aef3fe6ce8c8dbd15",
"lessThan": "dddc944d65169b552e09cb54e3ed4fbb9ea26416",
"versionType": "git"
},
{
"status": "affected",
"version": "5702f75375aa9ecf8ad3431aef3fe6ce8c8dbd15",
"lessThan": "eee16f3ff08e759ea828bdf7dc1c0ef2f22134f5",
"versionType": "git"
},
{
"status": "affected",
"version": "5702f75375aa9ecf8ad3431aef3fe6ce8c8dbd15",
"lessThan": "c12a0c3ef815ddd67e47f9c819f9fe822fed5467",
"versionType": "git"
},
{
"status": "affected",
"version": "5702f75375aa9ecf8ad3431aef3fe6ce8c8dbd15",
"lessThan": "f02a412c0a18f02f0f91b0a3d9788315a721b7fd",
"versionType": "git"
},
{
"status": "affected",
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"lessThan": "10014310193cf6736c1aeb4105c5f4a0818d0c65",
"versionType": "git"
},
{
"status": "affected",
"version": "5702f75375aa9ecf8ad3431aef3fe6ce8c8dbd15",
"lessThan": "3b32caa73d135eea8fb9cabb45e9fc64c5a3ecb9",
"versionType": "git"
},
{
"status": "affected",
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"lessThan": "baeb66fbd4201d1c4325074e78b1f557dff89b5b",
"versionType": "git"
}
],
"programFiles": [
"drivers/usb/gadget/udc/core.c",
"include/linux/usb/gadget.h"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.12"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.12",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.248",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.198",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.159",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.119",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.61",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.17.11",
"versionType": "semver",
"lessThanOrEqual": "6.17.*"
},
{
"status": "unaffected",
"version": "6.18",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/usb/gadget/udc/core.c",
"include/linux/usb/gadget.h"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2025-12-16T16:16:06.970",
"references": [
{
"url": "https://git.kernel.org/stable/c/10014310193cf6736c1aeb4105c5f4a0818d0c65",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/3b32caa73d135eea8fb9cabb45e9fc64c5a3ecb9",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/baeb66fbd4201d1c4325074e78b1f557dff89b5b",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/c12a0c3ef815ddd67e47f9c819f9fe822fed5467",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/dddc944d65169b552e09cb54e3ed4fbb9ea26416",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/eee16f3ff08e759ea828bdf7dc1c0ef2f22134f5",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/f02a412c0a18f02f0f91b0a3d9788315a721b7fd",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Deferred",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: udc: fix use-after-free in usb_gadget_state_work\n\nA race condition during gadget teardown can lead to a use-after-free\nin usb_gadget_state_work(), as reported by KASAN:\n\n BUG: KASAN: invalid-access in sysfs_notify+0x2c/0xd0\n Workqueue: events usb_gadget_state_work\n\nThe fundamental race occurs because a concurrent event (e.g., an\ninterrupt) can call usb_gadget_set_state() and schedule gadget->work\nat any time during the cleanup process in usb_del_gadget().\n\nCommit 399a45e5237c (\"usb: gadget: core: flush gadget workqueue after\ndevice removal\") attempted to fix this by moving flush_work() to after\ndevice_del(). However, this does not fully solve the race, as a new\nwork item can still be scheduled *after* flush_work() completes but\nbefore the gadget's memory is freed, leading to the same use-after-free.\n\nThis patch fixes the race condition robustly by introducing a 'teardown'\nflag and a 'state_lock' spinlock to the usb_gadget struct. The flag is\nset during cleanup in usb_del_gadget() *before* calling flush_work() to\nprevent any new work from being scheduled once cleanup has commenced.\nThe scheduling site, usb_gadget_set_state(), now checks this flag under\nthe lock before queueing the work, thus safely closing the race window."
}
],
"lastModified": "2026-06-17T09:58:51.907",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}