{"id":"DEBIAN-CVE-2025-38268","details":"In the Linux kernel, the following vulnerability has been resolved:  usb: typec: tcpm: move tcpm_queue_vdm_unlocked to asynchronous work  A state check was previously added to tcpm_queue_vdm_unlocked to prevent a deadlock where the DisplayPort Alt Mode driver would be executing work and attempting to grab the tcpm_lock while the TCPM was holding the lock and attempting to unregister the altmode, blocking on the altmode driver's cancel_work_sync call.  Because the state check isn't protected, there is a small window where the Alt Mode driver could determine that the TCPM is in a ready state and attempt to grab the lock while the TCPM grabs the lock and changes the TCPM state to one that causes the deadlock. The callstack is provided below:  [110121.667392][    C7] Call trace: [110121.667396][    C7]  __switch_to+0x174/0x338 [110121.667406][    C7]  __schedule+0x608/0x9f0 [110121.667414][    C7]  schedule+0x7c/0xe8 [110121.667423][    C7]  kernfs_drain+0xb0/0x114 [110121.667431][    C7]  __kernfs_remove+0x16c/0x20c [110121.667436][    C7]  kernfs_remove_by_name_ns+0x74/0xe8 [110121.667442][    C7]  sysfs_remove_group+0x84/0xe8 [110121.667450][    C7]  sysfs_remove_groups+0x34/0x58 [110121.667458][    C7]  device_remove_groups+0x10/0x20 [110121.667464][    C7]  device_release_driver_internal+0x164/0x2e4 [110121.667475][    C7]  device_release_driver+0x18/0x28 [110121.667484][    C7]  bus_remove_device+0xec/0x118 [110121.667491][    C7]  device_del+0x1e8/0x4ac [110121.667498][    C7]  device_unregister+0x18/0x38 [110121.667504][    C7]  typec_unregister_altmode+0x30/0x44 [110121.667515][    C7]  tcpm_reset_port+0xac/0x370 [110121.667523][    C7]  tcpm_snk_detach+0x84/0xb8 [110121.667529][    C7]  run_state_machine+0x4c0/0x1b68 [110121.667536][    C7]  tcpm_state_machine_work+0x94/0xe4 [110121.667544][    C7]  kthread_worker_fn+0x10c/0x244 [110121.667552][    C7]  kthread+0x104/0x1d4 [110121.667557][    C7]  ret_from_fork+0x10/0x20  [110121.667689][    C7] Workqueue: events dp_altmode_work [110121.667697][    C7] Call trace: [110121.667701][    C7]  __switch_to+0x174/0x338 [110121.667710][    C7]  __schedule+0x608/0x9f0 [110121.667717][    C7]  schedule+0x7c/0xe8 [110121.667725][    C7]  schedule_preempt_disabled+0x24/0x40 [110121.667733][    C7]  __mutex_lock+0x408/0xdac [110121.667741][    C7]  __mutex_lock_slowpath+0x14/0x24 [110121.667748][    C7]  mutex_lock+0x40/0xec [110121.667757][    C7]  tcpm_altmode_enter+0x78/0xb4 [110121.667764][    C7]  typec_altmode_enter+0xdc/0x10c [110121.667769][    C7]  dp_altmode_work+0x68/0x164 [110121.667775][    C7]  process_one_work+0x1e4/0x43c [110121.667783][    C7]  worker_thread+0x25c/0x430 [110121.667789][    C7]  kthread+0x104/0x1d4 [110121.667794][    C7]  ret_from_fork+0x10/0x20  Change tcpm_queue_vdm_unlocked to queue for tcpm_queue_vdm_work, which can perform the state check while holding the TCPM lock while the Alt Mode lock is no longer held. This requires a new struct to hold the vdm data, altmode_vdm_event.","modified":"2026-08-27T23:05:21.649538504Z","published":"2025-07-10T08:15:24.963Z","upstream":["CVE-2025-38268"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2025-38268"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.12.35-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2025-38268.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.12.35-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2025-38268.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}