CVE-2026-80824Hinoki check available

Local kernel crash via usbfs device use-after-free

Published Sep 4, 2026 · Updated Sep 4, 2026

Use-after-free in the Linux kernel usbfs component allows local users to crash the kernel through a crafted asynchronous USB request. usbdev_release() drops the usb_device reference before draining completed mmap-backed URBs, so free_async() follows ps->dev after usb_put_dev() has freed it. Exploitation requires read/write access to a /dev/bus/usb node, a mapped URB buffer, and disconnection of the associated USB device before unmapping and closing it.

CVSS severityUnavailable
Unscored
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Use-after-free in the Linux kernel usbfs component allows local users to crash the kernel through a crafted asynchronous USB request. usbdev_release() drops the usb_device reference before draining completed mmap-backed URBs, so free_async() follows ps->dev after usb_put_dev() has freed it. Exploitation requires read/write access to a /dev/bus/usb node, a mapped URB buffer, and disconnection of the associated USB device before unmapping and closing it.

The record

CVE
CVE-2026-80824
Published
Sep 4, 2026
Updated
Sep 4, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 4, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=4.6
  2. Affected versionversion=f7d34b445abc00e979b7cf36b9580ac3d1a47cd8 <0a960b88c5979f853019d4dc4957dfbeeb193440
  3. Affected versionversion=f7d34b445abc00e979b7cf36b9580ac3d1a47cd8 <0dd68b5d01d022fc9c5e71c82a82b0a94d3d0671
  4. Affected versionversion=f7d34b445abc00e979b7cf36b9580ac3d1a47cd8 <47a7f98fbb5006d46d15a3a210ffdc61448a4f19
  5. Affected versionversion=f7d34b445abc00e979b7cf36b9580ac3d1a47cd8 <5f08c45bdcfd28d1171de38c5ef29fc89a76eedc
  6. Affected versionversion=f7d34b445abc00e979b7cf36b9580ac3d1a47cd8 <65879e0a452ca2a234b9475e0c11aff7a4343738
  7. Affected versionversion=f7d34b445abc00e979b7cf36b9580ac3d1a47cd8 <7f0278e474c4d1c4457974ff1137cc385c944ab3
  8. Affected versionversion=f7d34b445abc00e979b7cf36b9580ac3d1a47cd8 <96f5520fc9a5e4bbf77ac93c9d5ce502f597e6cf
  9. Affected versionversion=f7d34b445abc00e979b7cf36b9580ac3d1a47cd8 <b3cde26a66b04f1d90ed0b675899c88b4e49d424
  10. Affected versionversion=f7d34b445abc00e979b7cf36b9580ac3d1a47cd8 <bd4bffc621a8cb2f4d9ed9b6447415de524a3bef

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.6; version=f7d34b445abc00e979b7cf36b9580ac3d1a47cd8 <0a960b88c5979f853019d4dc4957dfbeeb193440; version=f7d34b445abc00e979b7cf36b9580ac3d1a47cd8 <0dd68b5d01d022fc9c5e71c82a82b0a94d3d0671; version=f7d34b445abc00e979b7cf36b9580ac3d1a47cd8 <47a7f98fbb5006d46d15a3a210ffdc61448a4f19; version=f7d34b445abc00e979b7cf36b9580ac3d1a47cd8 <5f08c45bdcfd28d1171de38c5ef29fc89a76eedc; version=f7d34b445abc00e979b7cf36b9580ac3d1a47cd8 <65879e0a452ca2a234b9475e0c11aff7a4343738; version=f7d34b445abc00e979b7cf36b9580ac3d1a47cd8 <7f0278e474c4d1c4457974ff1137cc385c944ab3; version=f7d34b445abc00e979b7cf36b9580ac3d1a47cd8 <96f5520fc9a5e4bbf77ac93c9d5ce502f597e6cf; version=f7d34b445abc00e979b7cf36b9580ac3d1a47cd8 <b3cde26a66b04f1d90ed0b675899c88b4e49d424; version=f7d34b445abc00e979b7cf36b9580ac3d1a47cd8 <bd4bffc621a8cb2f4d9ed9b6447415de524a3bef

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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