CVE-2026-93819Hinoki check available

System crash via unlocked PCI root-bus removal

Published Sep 24, 2026 · Updated Sep 24, 2026

Race condition in the MediaTek PCIe controller in Linux allows local users to crash the system through concurrent sysfs operations. The mtk_pcie_remove() path stops and removes a PCI root bus without holding pci_rescan_remove_lock, allowing a concurrent rescan or hotplug operation to access freed state. The required gate is local ability to trigger the relevant sysfs operations; the bounded result is a use-after-free condition or system crash.

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

What happened

Race condition in the MediaTek PCIe controller in Linux allows local users to crash the system through concurrent sysfs operations. The mtk_pcie_remove() path stops and removes a PCI root bus without holding pci_rescan_remove_lock, allowing a concurrent rescan or hotplug operation to access freed state. The required gate is local ability to trigger the relevant sysfs operations; the bounded result is a use-after-free condition or system crash.

The record

CVE
CVE-2026-93819
Published
Sep 24, 2026
Updated
Sep 24, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
Unavailable

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 <a29812a55da8d0dbeb071b26ac428c338e3fc389
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a568939487dcbc1a3e341208585e224be897e25e
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c57b971765f835138fa2fce3f2a171b004cbb114

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=0 <6.12.111; version=0 <6.18.53; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a29812a55da8d0dbeb071b26ac428c338e3fc389; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a568939487dcbc1a3e341208585e224be897e25e; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <c57b971765f835138fa2fce3f2a171b004cbb114

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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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

Technologies

Your stack

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