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CVE-2025-38268— usb: typec: tcpm: move tcpm_queue_vdm_unlocked to asynchronous work

EPSS 0.04% · P11
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I. Basic Information for CVE-2025-38268

Vulnerability Information
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Vulnerability Title
usb: typec: tcpm: move tcpm_queue_vdm_unlocked to asynchronous work
Source: NVD (National Vulnerability Database)
Vulnerability Description
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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于typec-tcpm中的状态检查问题，可能导致死锁。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux cdc9946ea6377e8e214b135ccc308c5e514ba25f ~ 7bdd712abefbec79176ab412d8c623e755c5d0ba -
LinuxLinux 6.9 -

II. Public POCs for CVE-2025-38268

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III. Intelligence Information for CVE-2025-38268

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Same Patch Batch · Linux · 2025-07-10 · 84 CVEs total

CVE-2025-38317wifi: ath12k: Fix buffer overflow in debugfs
CVE-2025-38328jffs2: check jffs2_prealloc_raw_node_refs() result in few other places
CVE-2025-38316wifi: mt76: mt7996: avoid NULL pointer dereference in mt7996_set_monitor()
CVE-2025-38315Bluetooth: btintel: Check dsbr size from EFI variable
CVE-2025-38314virtio-pci: Fix result size returned for the admin command completion
CVE-2025-38311iavf: get rid of the crit lock
CVE-2025-38310seg6: Fix validation of nexthop addresses
CVE-2025-38309drm/xe/vm: move xe_svm_init() earlier
CVE-2025-38308ASoC: Intel: avs: Fix possible null-ptr-deref when initing hw
CVE-2025-38313bus: fsl-mc: fix double-free on mc_dev
CVE-2025-38318perf: arm-ni: Fix missing platform_set_drvdata()
CVE-2025-38319drm/amd/pp: Fix potential NULL pointer dereference in atomctrl_initialize_mc_reg_table
CVE-2025-38320arm64/ptrace: Fix stack-out-of-bounds read in regs_get_kernel_stack_nth()
CVE-2025-38321smb: Log an error when close_all_cached_dirs fails
CVE-2025-38322perf/x86/intel: Fix crash in icl_update_topdown_event()
CVE-2025-38323net: atm: add lec_mutex
CVE-2025-38324mpls: Use rcu_dereference_rtnl() in mpls_route_input_rcu().
CVE-2025-38325ksmbd: add free_transport ops in ksmbd connection
CVE-2025-38326aoe: clean device rq_list in aoedev_downdev()
CVE-2025-38327fgraph: Do not enable function_graph tracer when setting funcgraph-args

Showing top 20 of 84 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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