CVE-2026-93820

System crash via unlocked PCI root-bus removal

Published Sep 24, 2026 · Updated Sep 24, 2026

Race condition in the Rockchip PCIe host controller in Linux allows local users to crash the system during root-bus removal. rockchip_pcie_remove() stops and removes the root bus without holding pci_rescan_remove_lock, so a concurrent sysfs rescan or hotplug operation can access freed bus state. Reaching the race requires a Rockchip host controller and privileged driver removal or PCI sysfs activity; the documented consequence is use-after-free or a system crash.

CVSS severityUnavailable
Unscored
EPSS probability0.17%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in the Rockchip PCIe host controller in Linux allows local users to crash the system during root-bus removal. rockchip_pcie_remove() stops and removes the root bus without holding pci_rescan_remove_lock, so a concurrent sysfs rescan or hotplug operation can access freed bus state. Reaching the race requires a Rockchip host controller and privileged driver removal or PCI sysfs activity; the documented consequence is use-after-free or a system crash.

The record

CVE
CVE-2026-93820
Published
Sep 24, 2026
Updated
Sep 24, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1529
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Sep 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 24, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=0 <6.12.111
  2. Affected versionversion=0 <6.18.53
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0bd9611587bb494c33566d825fe34b2705e4b167
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9b19201f57d87c4d0777621275dbc59bff41b7f2
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ebca7e5947720e9d4bd918af3e17720270c50744

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=0 <6.12.111; version=0 <6.18.53; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0bd9611587bb494c33566d825fe34b2705e4b167; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9b19201f57d87c4d0777621275dbc59bff41b7f2; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ebca7e5947720e9d4bd918af3e17720270c50744

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.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1529System Shutdown/Reboot

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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