CVE-2026-72454

Kernel crash via unlocked I3C device traversal

Published Aug 15, 2026 · Updated Aug 15, 2026

Race condition in the Linux kernel's MIPI I3C HCI driver allows local users to crash the system through concurrent I3C device changes. The IRQ handler calls i3c_hci_addr_to_dev() without bus.lock while that function traverses bus->devs.i3c, allowing device addition or removal to invalidate a traversed entry and cause a use-after-free. Exploitation requires local low-privileged access and an active MIPI I3C HCI path; the grounded consequence is a kernel crash.

CVSS severity7.8
High
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in the Linux kernel's MIPI I3C HCI driver allows local users to crash the system through concurrent I3C device changes. The IRQ handler calls i3c_hci_addr_to_dev() without bus.lock while that function traverses bus->devs.i3c, allowing device addition or removal to invalidate a traversed entry and cause a use-after-free. Exploitation requires local low-privileged access and an active MIPI I3C HCI path; the grounded consequence is a kernel crash.

The record

CVE
CVE-2026-72454
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-364, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 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=5.11
  2. Affected versionversion=9ad9a52cce2828d932ae9495181e3d6414f72c07 <650716f23eac488c6696babdc7805f6a6b7427ad
  3. Affected versionversion=9ad9a52cce2828d932ae9495181e3d6414f72c07 <8f851cab401c28287d536b1347d76f6e219c0db6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.11; version=9ad9a52cce2828d932ae9495181e3d6414f72c07 <650716f23eac488c6696babdc7805f6a6b7427ad; version=9ad9a52cce2828d932ae9495181e3d6414f72c07 <8f851cab401c28287d536b1347d76f6e219c0db6

Published CVSS scores

5.5Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.8Linux CNA via CVE.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

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

CWE-364Signal Handler Race Condition
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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