CVE-2026-63934

Stack disclosure via misdirected I2C read

Published Jul 19, 2026 · Updated Jul 19, 2026

Information disclosure in the Linux Kernel ITG3200 IIO driver allows local users to read uninitialized stack data via triggered scans. itg3200_read_all_channels passes &buf rather than buf to i2c_transfer, leaving the caller's scan buffer uninitialized before it is queued to /dev/iio:deviceX. Exposure requires an ITG3200 device using the triggered-buffer path; non-buffered raw reads are unaffected.

CVSS severityUnavailable
Unscored
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in the Linux Kernel ITG3200 IIO driver allows local users to read uninitialized stack data via triggered scans. itg3200_read_all_channels passes &buf rather than buf to i2c_transfer, leaving the caller's scan buffer uninitialized before it is queued to /dev/iio:deviceX. Exposure requires an ITG3200 device using the triggered-buffer path; non-buffered raw reads are unaffected.

The record

CVE
CVE-2026-63934
Published
Jul 19, 2026
Updated
Jul 19, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 19, 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=3.9
  2. Affected versionversion=9dbf091da080508e9f632d307f357beb79a0766b <15a0b3f33ffb6c78b3de6f69b026ceb09b973dd1
  3. Affected versionversion=9dbf091da080508e9f632d307f357beb79a0766b <31bbd4b87dd6701fa10e03ba7f6268e49e178d16
  4. Affected versionversion=9dbf091da080508e9f632d307f357beb79a0766b <63203bd072b613c18c237b906b1c9d2dc4527337
  5. Affected versionversion=9dbf091da080508e9f632d307f357beb79a0766b <6bdc3023d62ed5c7d591f0eb27a5adb37fb892ae
  6. Affected versionversion=9dbf091da080508e9f632d307f357beb79a0766b <8654b5e2617819ff4f7c78071dfd0275e971a9b6
  7. Affected versionversion=9dbf091da080508e9f632d307f357beb79a0766b <90e809376b0f0d1ddec2eec954aecdd2a5b40b0e
  8. Affected versionversion=9dbf091da080508e9f632d307f357beb79a0766b <b64dd5f3b38911054cbcc570df617e3e8e75e562
  9. Affected versionversion=9dbf091da080508e9f632d307f357beb79a0766b <cfc3283859cfdeacadf80d5e6880bdf871ffeaa6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=3.9; version=9dbf091da080508e9f632d307f357beb79a0766b <15a0b3f33ffb6c78b3de6f69b026ceb09b973dd1; version=9dbf091da080508e9f632d307f357beb79a0766b <31bbd4b87dd6701fa10e03ba7f6268e49e178d16; version=9dbf091da080508e9f632d307f357beb79a0766b <63203bd072b613c18c237b906b1c9d2dc4527337; version=9dbf091da080508e9f632d307f357beb79a0766b <6bdc3023d62ed5c7d591f0eb27a5adb37fb892ae; version=9dbf091da080508e9f632d307f357beb79a0766b <8654b5e2617819ff4f7c78071dfd0275e971a9b6; version=9dbf091da080508e9f632d307f357beb79a0766b <90e809376b0f0d1ddec2eec954aecdd2a5b40b0e; version=9dbf091da080508e9f632d307f357beb79a0766b <b64dd5f3b38911054cbcc570df617e3e8e75e562; version=9dbf091da080508e9f632d307f357beb79a0766b <cfc3283859cfdeacadf80d5e6880bdf871ffeaa6

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 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

No sourced classifications are available.

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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