{"id":"CVE-2025-68282","url":"https://www.cyber-defence.io/tools/cve/CVE-2025-68282","generatedAt":"2026-10-28T07:25:27.873Z","title":"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:…","description":"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.","published":"2025-12-16T16:16:07.000Z","lastModified":"2026-10-13T19:10:00.000Z","status":"Deferred","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","cvss":null,"cwe":[],"affected":[],"epss":{"score":0.00205,"percentile":0.10382,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"unknown","text":"Not yet scored. NVD analysis is pending; check back once CVSS and EPSS values are published."},"changes":[],"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"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2025-68282","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}