CVE-2026-64271

Arbitrary code execution via unchecked packet index

Published Jul 25, 2026 · Updated Jul 25, 2026

Heap out-of-bounds write in the touchwin driver in affected Linux Kernel releases allows physically proximate attackers to execute code. In tw_interrupt(), the driver increments a running index into the three-byte tw->data array but resets it only when two device-controlled Y bytes match. A malicious, malfunctioning, or counterfeit serial Touchwindow peripheral can keep those bytes unequal, driving attacker-chosen writes past the buffer and enabling kernel-context code execution.

CVSS severity7.8
High
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap out-of-bounds write in the touchwin driver in affected Linux Kernel releases allows physically proximate attackers to execute code. In tw_interrupt(), the driver increments a running index into the three-byte tw->data array but resets it only when two device-controlled Y bytes match. A malicious, malfunctioning, or counterfeit serial Touchwindow peripheral can keep those bytes unequal, driving attacker-chosen writes past the buffer and enabling kernel-context code execution.

The record

CVE
CVE-2026-64271
Published
Jul 25, 2026
Updated
Jul 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-129, T1200
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 25, 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=11ea3173d5f2de71d037ef58ac43395795fed2bc <044167cba2384bcd783547ad5e30ecd292b30919
  2. Affected versionversion=11ea3173d5f2de71d037ef58ac43395795fed2bc <3e6f007b43e2fc6546e21fa74ee62c38984a6672
  3. Affected versionversion=11ea3173d5f2de71d037ef58ac43395795fed2bc <431ad239f2924dff337c3fccb9246597c1b63185
  4. Affected versionversion=11ea3173d5f2de71d037ef58ac43395795fed2bc <478cdd736f2ce3114f90e775d7358136d3977b94
  5. Affected versionversion=11ea3173d5f2de71d037ef58ac43395795fed2bc <6c9f29f128dd4057404838259af4c645318487e1
  6. Affected versionversion=11ea3173d5f2de71d037ef58ac43395795fed2bc <70e4248793762df9832fd4fc2fc6ac7924572c36
  7. Affected versionversion=11ea3173d5f2de71d037ef58ac43395795fed2bc <a8d87184576c889759e3aab899799a482f1e1a5b
  8. Affected versionversion=11ea3173d5f2de71d037ef58ac43395795fed2bc <ed9b66905407eb3d02df1aaeed82eb7a7f0eb508
  9. Affected versionversion=2.6.19

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=11ea3173d5f2de71d037ef58ac43395795fed2bc <044167cba2384bcd783547ad5e30ecd292b30919; version=11ea3173d5f2de71d037ef58ac43395795fed2bc <3e6f007b43e2fc6546e21fa74ee62c38984a6672; version=11ea3173d5f2de71d037ef58ac43395795fed2bc <431ad239f2924dff337c3fccb9246597c1b63185; version=11ea3173d5f2de71d037ef58ac43395795fed2bc <478cdd736f2ce3114f90e775d7358136d3977b94; version=11ea3173d5f2de71d037ef58ac43395795fed2bc <6c9f29f128dd4057404838259af4c645318487e1; version=11ea3173d5f2de71d037ef58ac43395795fed2bc <70e4248793762df9832fd4fc2fc6ac7924572c36; version=11ea3173d5f2de71d037ef58ac43395795fed2bc <a8d87184576c889759e3aab899799a482f1e1a5b; version=11ea3173d5f2de71d037ef58ac43395795fed2bc <ed9b66905407eb3d02df1aaeed82eb7a7f0eb508; version=2.6.19

Published CVSS scores

7.8NIST NVDCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorphysical
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-129Improper Validation of Array Index
T1200Hardware Additions

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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