CVE-2026-63927

Kernel code execution via post-giveback URB dereference

Published Jul 19, 2026 · Updated Jul 19, 2026

Use-after-free in the Linux Kernel DWC2 host controller allows local users to execute kernel code through USB URB cancellation. In drivers/usb/dwc2/hcd.c, the dequeue path calls usb_hcd_giveback_urb() and then logs urb->status after giveback can free the URB. Reachability requires DWC2 hardware, enabled debug logging, and USB-device-node access; concurrent cancellation can corrupt kernel memory, panic or hang the host, or execute kernel code.

CVSS severity7.8
High
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Linux Kernel DWC2 host controller allows local users to execute kernel code through USB URB cancellation. In drivers/usb/dwc2/hcd.c, the dequeue path calls usb_hcd_giveback_urb() and then logs urb->status after giveback can free the URB. Reachability requires DWC2 hardware, enabled debug logging, and USB-device-node access; concurrent cancellation can corrupt kernel memory, panic or hang the host, or execute kernel code.

The record

CVE
CVE-2026-63927
Published
Jul 19, 2026
Updated
Jul 19, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 19, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.10
  2. Affected versionversion=7359d482eb4d3967cc8be354405ae6be6eaf732c <0584af4fe40fa5e254a05d69ce658746de641708
  3. Affected versionversion=7359d482eb4d3967cc8be354405ae6be6eaf732c <63b0dafa676aad4d0c3f01a61ad8e2990907660c
  4. Affected versionversion=7359d482eb4d3967cc8be354405ae6be6eaf732c <6d0b79d1d1118145e48a68192b6d733e39387053
  5. Affected versionversion=7359d482eb4d3967cc8be354405ae6be6eaf732c <84ea928ed584756e59c6ac09736f12d1db95ded0
  6. Affected versionversion=7359d482eb4d3967cc8be354405ae6be6eaf732c <9ea06a3fbf9f16e0d98c52cb3b99642be15ec281
  7. Affected versionversion=7359d482eb4d3967cc8be354405ae6be6eaf732c <9fe1d84f7e2cf33634e8afb7f4b7f8de182dd913
  8. Affected versionversion=7359d482eb4d3967cc8be354405ae6be6eaf732c <a15eeeceb94cbc04edef395e4d777ff554bdc27d
  9. Affected versionversion=7359d482eb4d3967cc8be354405ae6be6eaf732c <d5fc183ed614aeba6779cc992325be560f9a4451

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=3.10; version=7359d482eb4d3967cc8be354405ae6be6eaf732c <0584af4fe40fa5e254a05d69ce658746de641708; version=7359d482eb4d3967cc8be354405ae6be6eaf732c <63b0dafa676aad4d0c3f01a61ad8e2990907660c; version=7359d482eb4d3967cc8be354405ae6be6eaf732c <6d0b79d1d1118145e48a68192b6d733e39387053; version=7359d482eb4d3967cc8be354405ae6be6eaf732c <84ea928ed584756e59c6ac09736f12d1db95ded0; version=7359d482eb4d3967cc8be354405ae6be6eaf732c <9ea06a3fbf9f16e0d98c52cb3b99642be15ec281; version=7359d482eb4d3967cc8be354405ae6be6eaf732c <9fe1d84f7e2cf33634e8afb7f4b7f8de182dd913; version=7359d482eb4d3967cc8be354405ae6be6eaf732c <a15eeeceb94cbc04edef395e4d777ff554bdc27d; version=7359d482eb4d3967cc8be354405ae6be6eaf732c <d5fc183ed614aeba6779cc992325be560f9a4451

Published CVSS scores

7.8kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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

T1068Exploitation for Privilege Escalation

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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