CVE-2023-53475
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: usb: xhci: tegra: fix sleep in atomic call When we set the dual-role port to Host mode, we observed the following splat: [ 167.057718] BUG: sleeping function called from invalid context at include/linux/sched/mm.h:229 [ 167.057872] Workqueue: events tegra_xusb_usb_phy_work [ 167.057954] Call trace: [ 167.057962] dump_backtrace+0x0/0x210 [ 167.057996] show_stack+0x30/0x50 [ 167.058020] dump_stack_lvl+0x64/0x84 [ 167.058065] dump_stack+0x14/0x34 [ 167.058100] __might_resched+0x144/0x180 [ 167.058140] __might_sleep+0x64/0xd0 [ 167.058171] slab_pre_alloc_hook.constprop.0+0xa8/0x110 [ 167.058202] __kmalloc_track_caller+0x74/0x2b0 [ 167.058233] kvasprintf+0xa4/0x190 [ 167.058261] kasprintf+0x58/0x90 [ 167.058285] tegra_xusb_find_port_node.isra.0+0x58/0xd0 [ 167.058334] tegra_xusb_find_port+0x38/0xa0 [ 167.058380] tegra_xusb_padctl_get_usb3_companion+0x38/0xd0 [ 167.058430] tegra_xhci_id_notify+0x8c/0x1e0 [ 167.058473] notifier_call_chain+0x88/0x100 [ 167.058506] atomic_notifier_call_chain+0x44/0x70 [ 167.058537] tegra_xusb_usb_phy_work+0x60/0xd0 [ 167.058581] process_one_work+0x1dc/0x4c0 [ 167.058618] worker_thread+0x54/0x410 [ 167.058650] kthread+0x188/0x1b0 [ 167.058672] ret_from_fork+0x10/0x20 The function tegra_xusb_padctl_get_usb3_companion eventually calls tegra_xusb_find_port and this in turn calls kasprintf which might sleep and so cannot be called from an atomic context. Fix this by moving the call to tegra_xusb_padctl_get_usb3_companion to the tegra_xhci_id_work function where it is really needed.
Severity
MEDIUM
CVSS score
5.5
(v3.1)
Vulnerability status
Analyzed
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2025-10-01 12:15:49.830000
Last modified
2026-11-05 21:17:22.037000
View original CVE JSON
{
"id": "CVE-2023-53475",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2025-10-01T12:15:49.830",
"lastModified": "2026-11-05T21:17:22.037",
"vulnStatus": "Analyzed",
"cveTags": [],
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{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: xhci: tegra: fix sleep in atomic call\n\nWhen we set the dual-role port to Host mode, we observed the following\nsplat:\n[ 167.057718] BUG: sleeping function called from invalid context at\ninclude/linux/sched/mm.h:229\n[ 167.057872] Workqueue: events tegra_xusb_usb_phy_work\n[ 167.057954] Call trace:\n[ 167.057962] dump_backtrace+0x0/0x210\n[ 167.057996] show_stack+0x30/0x50\n[ 167.058020] dump_stack_lvl+0x64/0x84\n[ 167.058065] dump_stack+0x14/0x34\n[ 167.058100] __might_resched+0x144/0x180\n[ 167.058140] __might_sleep+0x64/0xd0\n[ 167.058171] slab_pre_alloc_hook.constprop.0+0xa8/0x110\n[ 167.058202] __kmalloc_track_caller+0x74/0x2b0\n[ 167.058233] kvasprintf+0xa4/0x190\n[ 167.058261] kasprintf+0x58/0x90\n[ 167.058285] tegra_xusb_find_port_node.isra.0+0x58/0xd0\n[ 167.058334] tegra_xusb_find_port+0x38/0xa0\n[ 167.058380] tegra_xusb_padctl_get_usb3_companion+0x38/0xd0\n[ 167.058430] tegra_xhci_id_notify+0x8c/0x1e0\n[ 167.058473] notifier_call_chain+0x88/0x100\n[ 167.058506] atomic_notifier_call_chain+0x44/0x70\n[ 167.058537] tegra_xusb_usb_phy_work+0x60/0xd0\n[ 167.058581] process_one_work+0x1dc/0x4c0\n[ 167.058618] worker_thread+0x54/0x410\n[ 167.058650] kthread+0x188/0x1b0\n[ 167.058672] ret_from_fork+0x10/0x20\n\nThe function tegra_xusb_padctl_get_usb3_companion eventually calls\ntegra_xusb_find_port and this in turn calls kasprintf which might sleep\nand so cannot be called from an atomic context.\n\nFix this by moving the call to tegra_xusb_padctl_get_usb3_companion to\nthe tegra_xhci_id_work function where it is really needed."
}
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"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"attackVector": "LOCAL",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"availabilityImpact": "HIGH"
},
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"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"timestamp": "2026-11-05T20:21:53.870574Z",
"id": "CVE-2023-53475",
"options": [
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{
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"source": "[email protected]",
"type": "Primary",
"description": [
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