cbcvebase.
CVE-2025-68282
published 2025-12-16

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…

PriorityP423high7.8
EPSS
0.18%
8.1th percentile
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: BUG: KASAN: invalid-access in sysfs_notify+0x2c/0xd0 Workqueue: events usb_gadget_state_work 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(). 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.

Affected

26 ranges· showing 25
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.159-1 (bookworm)linux 6.1.159-1 (bookworm)
debianlinux-6.1< linux 6.1.159-1 (bookworm)linux 6.1.159-1 (bookworm)
linuxlinux
linuxlinux>= 5702f75375aa9ecf8ad3431aef3fe6ce8c8dbd15 < dddc944d65169b552e09cb54e3ed4fbb9ea26416dddc944d65169b552e09cb54e3ed4fbb9ea26416
linuxlinux>= 5702f75375aa9ecf8ad3431aef3fe6ce8c8dbd15 < eee16f3ff08e759ea828bdf7dc1c0ef2f22134f5eee16f3ff08e759ea828bdf7dc1c0ef2f22134f5
linuxlinux>= 5702f75375aa9ecf8ad3431aef3fe6ce8c8dbd15 < c12a0c3ef815ddd67e47f9c819f9fe822fed5467c12a0c3ef815ddd67e47f9c819f9fe822fed5467
linuxlinux>= 5702f75375aa9ecf8ad3431aef3fe6ce8c8dbd15 < f02a412c0a18f02f0f91b0a3d9788315a721b7fdf02a412c0a18f02f0f91b0a3d9788315a721b7fd
linuxlinux>= 5702f75375aa9ecf8ad3431aef3fe6ce8c8dbd15 < 10014310193cf6736c1aeb4105c5f4a0818d0c6510014310193cf6736c1aeb4105c5f4a0818d0c65
linuxlinux>= 5702f75375aa9ecf8ad3431aef3fe6ce8c8dbd15 < 3b32caa73d135eea8fb9cabb45e9fc64c5a3ecb93b32caa73d135eea8fb9cabb45e9fc64c5a3ecb9
linuxlinux>= 5702f75375aa9ecf8ad3431aef3fe6ce8c8dbd15 < baeb66fbd4201d1c4325074e78b1f557dff89b5bbaeb66fbd4201d1c4325074e78b1f557dff89b5b
linuxlinux_kernel>= 0 < 5.10.249-15.10.249-1
linuxlinux_kernel>= 0 < 6.1.159-16.1.159-1
linuxlinux_kernel>= 0 < 6.12.63-16.12.63-1
linuxlinux_kernel>= 0 < 6.17.11-16.17.11-1
linuxlinux_kernel>= 0 < 5.15.0-173.1835.15.0-173.183
linuxlinux_kernel>= 0 < 6.8.0-106.1066.8.0-106.106
linuxlinux_kernel>= 0 < 6.17.0-19.196.17.0-19.19
linuxlinux_kernel>= 3.12.0 < 5.10.2485.10.248
linuxlinux_kernel>= 5.11.0 < 5.15.1985.15.198
linuxlinux_kernel>= 5.16.0 < 6.1.1596.1.159
linuxlinux_kernel>= 6.13.0 < 6.17.116.17.11
linuxlinux_kernel>= 6.2.0 < 6.6.1196.6.119
linuxlinux_kernel>= 6.7.0 < 6.12.616.12.61
msrcazl3_kernel_6.6.117.1-1_on_azure_linux_3.0
ubuntulinux-azure-5.15

CVSS provenance

osv7.8HIGH
vendor_ubuntu7.8HIGH
vendor_redhat6.3MEDIUM
vendor_msrc5.5MEDIUM
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