CVE-2024-26593

Incorrect SMBus data read via unreset buffer index

Published Feb 23, 2024 · Updated May 11, 2026

Incorrect data handling in the Linux kernel's i2c-i801 driver allows attackers to receive the wrong SMBus block-process-call data. During a block process call, the driver resets the block-buffer index before writing but fails to reset it again before reading the response. Exposure requires an Intel i801-compatible SMBus controller and a block process call; the documented consequence is incorrect returned data.

CVSS severityUnavailable
Unscored
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect data handling in the Linux kernel's i2c-i801 driver allows attackers to receive the wrong SMBus block-process-call data. During a block process call, the driver resets the block-buffer index before writing but fails to reset it again before reading the response. Exposure requires an Intel i801-compatible SMBus controller and a block process call; the documented consequence is incorrect returned data.

The record

CVE
CVE-2024-26593
Published
Feb 23, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-125
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Feb 23, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=315cd67c945351f8a569500f8ab16b7fa94026e8 <1f8d0691c50581ba6043f009ec9e8b9f78f09d5a
  2. Affected versionversion=315cd67c945351f8a569500f8ab16b7fa94026e8 <491528935c9c48bf341d8b40eabc6c4fc5df6f2c
  3. Affected versionversion=315cd67c945351f8a569500f8ab16b7fa94026e8 <609c7c1cc976e740d0fed4dbeec688b3ecb5dce2
  4. Affected versionversion=315cd67c945351f8a569500f8ab16b7fa94026e8 <6be99c51829b24c914cef5bff6164877178e84d9
  5. Affected versionversion=315cd67c945351f8a569500f8ab16b7fa94026e8 <7a14b8a477b88607d157c24aeb23e7389ec3319f
  6. Affected versionversion=315cd67c945351f8a569500f8ab16b7fa94026e8 <c1c9d0f6f7f1dbf29db996bd8e166242843a5f21
  7. Affected versionversion=315cd67c945351f8a569500f8ab16b7fa94026e8 <d074d5ff5ae77b18300e5079c6bda6342a4d44b7
  8. Affected versionversion=5.3

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=315cd67c945351f8a569500f8ab16b7fa94026e8 <1f8d0691c50581ba6043f009ec9e8b9f78f09d5a; version=315cd67c945351f8a569500f8ab16b7fa94026e8 <491528935c9c48bf341d8b40eabc6c4fc5df6f2c; version=315cd67c945351f8a569500f8ab16b7fa94026e8 <609c7c1cc976e740d0fed4dbeec688b3ecb5dce2; version=315cd67c945351f8a569500f8ab16b7fa94026e8 <6be99c51829b24c914cef5bff6164877178e84d9; version=315cd67c945351f8a569500f8ab16b7fa94026e8 <7a14b8a477b88607d157c24aeb23e7389ec3319f; version=315cd67c945351f8a569500f8ab16b7fa94026e8 <c1c9d0f6f7f1dbf29db996bd8e166242843a5f21; version=315cd67c945351f8a569500f8ab16b7fa94026e8 <d074d5ff5ae77b18300e5079c6bda6342a4d44b7; version=5.3

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.

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No observations available

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

Weakness, pattern, technique

CWE-125Out-of-bounds Read

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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