CVE-2026-53051

Service interruption via pre-power-on DBI access

Published Jun 24, 2026 · Updated Jun 24, 2026

Improper hardware state handling in the Linux Kernel allows local users to trigger a Control Backbone timeout through repeated PERST# transitions. The Tegra194 PCIe endpoint reset path calls pci_epc_deinit_notify() and dw_pcie_ep_cleanup() before reset_control_deassert() powers the controller core, causing DBI register offset 0x8bc to be read while the hardware is unavailable. Triggering requires the Tegra194 endpoint controller and a second assert-deassert cycle; the resulting timeout interrupts availability without reported data disclosure or modification.

CVSS severity5.5
Medium
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper hardware state handling in the Linux Kernel allows local users to trigger a Control Backbone timeout through repeated PERST# transitions. The Tegra194 PCIe endpoint reset path calls pci_epc_deinit_notify() and dw_pcie_ep_cleanup() before reset_control_deassert() powers the controller core, causing DBI register offset 0x8bc to be read while the hardware is unavailable. Triggering requires the Tegra194 endpoint controller and a second assert-deassert cycle; the resulting timeout interrupts availability without reported data disclosure or modification.

The record

CVE
CVE-2026-53051
Published
Jun 24, 2026
Updated
Jun 24, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 24, 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=40e2125381dc11379112485e3eefdd25c6df5375 <34b3eef48d980cd37b876e128bbf314f69fb5d70
  2. Affected versionversion=40e2125381dc11379112485e3eefdd25c6df5375 <b059a41bdd5b202b2b9d7708403fb43c69689e53
  3. Affected versionversion=40e2125381dc11379112485e3eefdd25c6df5375 <ce899f9c019591b73ef84b9afa332ed53beece25
  4. Affected versionversion=6.11.11 <6.12
  5. Affected versionversion=6.12.2 <6.12.91
  6. Affected versionversion=6.13
  7. Affected versionversion=70212c2300971506e986d95000d2745529cac9d7
  8. Affected versionversion=72034050ccf4202cd6558b0afd2474f756ea3b9b <010983063a806720b45778d191335f8ea864fea3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=40e2125381dc11379112485e3eefdd25c6df5375 <34b3eef48d980cd37b876e128bbf314f69fb5d70; version=40e2125381dc11379112485e3eefdd25c6df5375 <b059a41bdd5b202b2b9d7708403fb43c69689e53; version=40e2125381dc11379112485e3eefdd25c6df5375 <ce899f9c019591b73ef84b9afa332ed53beece25; version=6.11.11 <6.12; version=6.12.2 <6.12.91; version=6.13; version=70212c2300971506e986d95000d2745529cac9d7; version=72034050ccf4202cd6558b0afd2474f756ea3b9b <010983063a806720b45778d191335f8ea864fea3

Published CVSS scores

5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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
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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