CVE-2025-68327Public exploit

Synchronous external abort via post-clock-disable register access

Published Dec 22, 2025 · Updated Dec 22, 2025

Denial of service in Linux allows local users to trigger a synchronous external abort on Renesas RZ/G3S systems during USBHS unbind. During driver removal, usbhs_sys_function_pullup() reads an IP register after usbhs_remove() has already disabled the USBHS clocks, causing a bus error when module stop is active. Reachability requires administrative sysfs access, a configured USB gadget, the renesas_usbhs driver, and affected hardware; the documented consequence is the synchronous abort.

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

What happened

Denial of service in Linux allows local users to trigger a synchronous external abort on Renesas RZ/G3S systems during USBHS unbind. During driver removal, usbhs_sys_function_pullup() reads an IP register after usbhs_remove() has already disabled the USBHS clocks, causing a bus error when module stop is active. Reachability requires administrative sysfs access, a configured USB gadget, the renesas_usbhs driver, and affected hardware; the documented consequence is the synchronous abort.

The record

CVE
CVE-2025-68327
Published
Dec 22, 2025
Updated
Dec 22, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Dec 22, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 22, 2025Record 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=3.0
  2. Affected versionversion=f1407d5c66240b33d11a7f1a41d55ccf6a9d7647 <230b1bc1310edcd5c1b71dcd6b77ccba43139cb5
  3. Affected versionversion=f1407d5c66240b33d11a7f1a41d55ccf6a9d7647 <26838f147aeaa8f820ff799d72815fba5e209bd9
  4. Affected versionversion=f1407d5c66240b33d11a7f1a41d55ccf6a9d7647 <9d86bc8b188a77c8d6f7252280ec2bd24ad6fbc1
  5. Affected versionversion=f1407d5c66240b33d11a7f1a41d55ccf6a9d7647 <aa658a6d5ac21c7cde54c6d015f2d4daff32e02d
  6. Affected versionversion=f1407d5c66240b33d11a7f1a41d55ccf6a9d7647 <cd5e86e34c66a831b5cb9b720ad411a006962cc8
  7. Affected versionversion=f1407d5c66240b33d11a7f1a41d55ccf6a9d7647 <eb9ac779830b2235847b72cb15cf07c7e3333c5e
  8. Affected versionversion=f1407d5c66240b33d11a7f1a41d55ccf6a9d7647 <fd1a7bf3a8cac13f6d2d52d8c7570ba41621db9a

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=3.0; version=f1407d5c66240b33d11a7f1a41d55ccf6a9d7647 <230b1bc1310edcd5c1b71dcd6b77ccba43139cb5; version=f1407d5c66240b33d11a7f1a41d55ccf6a9d7647 <26838f147aeaa8f820ff799d72815fba5e209bd9; version=f1407d5c66240b33d11a7f1a41d55ccf6a9d7647 <9d86bc8b188a77c8d6f7252280ec2bd24ad6fbc1; version=f1407d5c66240b33d11a7f1a41d55ccf6a9d7647 <aa658a6d5ac21c7cde54c6d015f2d4daff32e02d; version=f1407d5c66240b33d11a7f1a41d55ccf6a9d7647 <cd5e86e34c66a831b5cb9b720ad411a006962cc8; version=f1407d5c66240b33d11a7f1a41d55ccf6a9d7647 <eb9ac779830b2235847b72cb15cf07c7e3333c5e; version=f1407d5c66240b33d11a7f1a41d55ccf6a9d7647 <fd1a7bf3a8cac13f6d2d52d8c7570ba41621db9a

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

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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