CVE-2026-64270

Kernel stack corruption via oversized I2C packet

Published Jul 25, 2026 · Updated Jul 25, 2026

Out-of-bounds write in the Linux Kernel mms114 touchscreen driver allows physically proximate attackers to corrupt the kernel stack. mms114_interrupt() trusts an 8-bit device packet size and passes up to 255 bytes to an I2C read into an 80-byte on-stack touch-event array. Exploitation requires a malicious or counterfeit controller or I2C-bus tampering and can overwrite the stack canary, saved registers, and return address.

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

Out-of-bounds write in the Linux Kernel mms114 touchscreen driver allows physically proximate attackers to corrupt the kernel stack. mms114_interrupt() trusts an 8-bit device packet size and passes up to 255 bytes to an I2C read into an 80-byte on-stack touch-event array. Exploitation requires a malicious or counterfeit controller or I2C-bus tampering and can overwrite the stack canary, saved registers, and return address.

The record

CVE
CVE-2026-64270
Published
Jul 25, 2026
Updated
Jul 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-787, 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=07b8481d4aff73d6f451f25e74ea10240ff5131e <5d2ea15ba03bf17ed143ff1a0995a4206edc3fb6
  2. Affected versionversion=07b8481d4aff73d6f451f25e74ea10240ff5131e <66725039f7090afe14c31bd259e2059a68f04023
  3. Affected versionversion=07b8481d4aff73d6f451f25e74ea10240ff5131e <8301c335305344d4da4ab9442b6a399dacfe5b8d
  4. Affected versionversion=07b8481d4aff73d6f451f25e74ea10240ff5131e <b78150729762d47c14fe29a2582bdca5568e62b8
  5. Affected versionversion=07b8481d4aff73d6f451f25e74ea10240ff5131e <f3d5e77b27fded71dcb97f409262bf0abba0410e
  6. Affected versionversion=3.6

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=07b8481d4aff73d6f451f25e74ea10240ff5131e <5d2ea15ba03bf17ed143ff1a0995a4206edc3fb6; version=07b8481d4aff73d6f451f25e74ea10240ff5131e <66725039f7090afe14c31bd259e2059a68f04023; version=07b8481d4aff73d6f451f25e74ea10240ff5131e <8301c335305344d4da4ab9442b6a399dacfe5b8d; version=07b8481d4aff73d6f451f25e74ea10240ff5131e <b78150729762d47c14fe29a2582bdca5568e62b8; version=07b8481d4aff73d6f451f25e74ea10240ff5131e <f3d5e77b27fded71dcb97f409262bf0abba0410e; version=3.6

Published CVSS scores

6.8Amazon LinuxCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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.

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

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorphysical
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write
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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