CVE-2026-23197

System crash via overwritten I2C error state

Published Feb 14, 2026 · Updated Feb 14, 2026

Denial of service in Linux Kernel 6.13 through 6.18.9 allows local users to crash the system through a malformed SMBus block read. The controller interrupt handler replaces the failure state with a read-continuation state after an invalid length, causing an endless read loop and buffer overrun. Access to the configured bus-controller path and the ability to provoke an invalid block length are required; the bounded consequence is a kernel crash.

CVSS severity5.5
Medium
EPSS probability0.10%
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 Kernel 6.13 through 6.18.9 allows local users to crash the system through a malformed SMBus block read. The controller interrupt handler replaces the failure state with a read-continuation state after an invalid length, causing an endless read loop and buffer overrun. Access to the configured bus-controller path and the ability to provoke an invalid block length are required; the bounded consequence is a kernel crash.

The record

CVE
CVE-2026-23197
Published
Feb 14, 2026
Updated
Feb 14, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-476, T1529
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 14, 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=5f5c2d4579ca6836f5604cca979debd68ecfe23f <3f9b508b3eecc00a243edf320bd83834d6a9b482
  2. Affected versionversion=5f5c2d4579ca6836f5604cca979debd68ecfe23f <b126097b0327437048bd045a0e4d273dea2910dd
  3. Affected versionversion=6.13

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=5f5c2d4579ca6836f5604cca979debd68ecfe23f <3f9b508b3eecc00a243edf320bd83834d6a9b482; version=5f5c2d4579ca6836f5604cca979debd68ecfe23f <b126097b0327437048bd045a0e4d273dea2910dd; version=6.13

Published CVSS scores

5.5NIST NVDCVSS: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.

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

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1529System Shutdown/Reboot

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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Your stack

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