Unknown

CVE-2026-63934 — iio: gyro: itg3200: fix i2c read into the wrong stack location

In the Linux kernel, the following vulnerability has been resolved: iio: gyro: itg3200: fix i2c read into the wrong stack location itg3200_read_all_channels() takes `__be16 *buf' as a parameter and fills the i2c_msg destination as `(char *)&buf'. Since `buf' is the parameter (a pointer), `&buf' is the address of the local pointer slot on the stack of itg3200_read_all_channels(), not the address of the caller's scan buffer. The (char *) cast hides the type mismatch. i2c_transfer() therefore writes ITG3200_SCAN_ELEMENTS * sizeof(s16) = 8 bytes into the parameter's stack slot, which is discarded when the function returns. The caller's scan buffer in itg3200_trigger_handler() is never written to, so iio_push_to_buffers_with_timestamp() pushes uninitialised stack contents to userspace via /dev/iio:deviceX every scan -- both a functional bug (no actual gyroscope or temperature data is delivered through the triggered buffer) and an information leak. The non-buffered read_raw() path is unaffected: it goes through itg3200_read_reg_s16() which uses `&out' on a local s16 value, where that is correct. Drop the spurious `&' so the i2c read writes into the caller's buffer.

Published Jul 19, 2026 · Updated Oct 15, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · CNA: Linux

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

EPSS 0.2% (30-day exploitation probability)+2

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

0.21%

ahead of 11% of scored CVEs · Oct 15, 2026

Affects

Linux

CVSS base

—

Score not published yet.

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Linux Linux).
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes, errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Linux	Linux	≥ 9dbf091da080508e9f632d307f357beb79a0766b and < 90e809376b0f0d1ddec2eec954aecdd2a5b40b0e≥ 9dbf091da080508e9f632d307f357beb79a0766b and < 8654b5e2617819ff4f7c78071dfd0275e971a9b6≥ 9dbf091da080508e9f632d307f357beb79a0766b and < b64dd5f3b38911054cbcc570df617e3e8e75e562≥ 9dbf091da080508e9f632d307f357beb79a0766b and < 31bbd4b87dd6701fa10e03ba7f6268e49e178d16≥ 9dbf091da080508e9f632d307f357beb79a0766b and < 63203bd072b613c18c237b906b1c9d2dc4527337≥ 9dbf091da080508e9f632d307f357beb79a0766b and < 15a0b3f33ffb6c78b3de6f69b026ceb09b973dd1≥ 9dbf091da080508e9f632d307f357beb79a0766b and < cfc3283859cfdeacadf80d5e6880bdf871ffeaa6≥ 9dbf091da080508e9f632d307f357beb79a0766b and < 6bdc3023d62ed5c7d591f0eb27a5adb37fb892ae and 1 more version 3.9	Vulnerable	CVE Program (cve.org) e CISA ADP

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Not enough vector or weakness data: use the affected application’s logs as a starting point.

application logs

Timeline

What happened to this CVE, newest first.

2026
Record published
Oct 15, 2026
Affected products added · linux/linux
Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
Source status changed · → Awaiting Analysis
Oct 15, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 15, 2026 · NIST National Vulnerability Database
CVE published
Jul 19, 2026 · Linux

Source activity

Repeated readings are counted rather than listed.

1× Official description updated · Oct 15, 2026 – Oct 15, 2026

References

8 on the record

git.kernel.org/stable/c/8654b5e2617819ff4f7c78071dfd0275e971a9b6
NIST National Vulnerability Database
git.kernel.org/stable/c/15a0b3f33ffb6c78b3de6f69b026ceb09b973dd1
NIST National Vulnerability Database
git.kernel.org/stable/c/b64dd5f3b38911054cbcc570df617e3e8e75e562
NIST National Vulnerability Database
git.kernel.org/stable/c/cfc3283859cfdeacadf80d5e6880bdf871ffeaa6
NIST National Vulnerability Database
git.kernel.org/stable/c/63203bd072b613c18c237b906b1c9d2dc4527337
NIST National Vulnerability Database
git.kernel.org/stable/c/31bbd4b87dd6701fa10e03ba7f6268e49e178d16
NIST National Vulnerability Database
git.kernel.org/stable/c/90e809376b0f0d1ddec2eec954aecdd2a5b40b0e
NIST National Vulnerability Database
git.kernel.org/stable/c/6bdc3023d62ed5c7d591f0eb27a5adb37fb892ae
NIST National Vulnerability Database

Elsewhere on this site

Linux
every CVE for this vendor

Related CVEs (same products)

Critical CVE-2026-99999 ipv4: validate checksum_start before completing checksum 1d
Unknown CVE-2026-98432 ipv4: free inet_opt and ireq_opt after an RCU grace period 1d
Unknown CVE-2026-98424 wifi: cfg80211: undo netns switch if renaming the wiphy fails 2d
Unknown CVE-2026-98425 wifi: mac80211: don't warn when an IBSS has no channel to scan 2d
Unknown CVE-2026-98426 wifi: mwifiex: fix IRQ leak using wrong index in MSI-X error path 2d
Unknown CVE-2026-98427 net/sched: codel: bound the dropping loop per dequeue call 2d

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No CVSS score published by NVD, the CNA, CISA or GitHub so far.
No fixed version, patch or mitigation documented.
No CISA SSVC assessment.
No CWE classification.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-63934 is "iio: gyro: itg3200: fix i2c read into the wrong stack location", rated Unknown. It affects Linux (Linux); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. EPSS 0.21% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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