iio: gyro: itg3200: fix i2c read into the wrong stack location
Summary
| CVE | CVE-2026-63934 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-07-19 16:17:11 UTC |
| Updated | 2026-07-19 16:17:11 UTC |
| Description | 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. |
Risk And Classification
EPSS: 0.002100000 probability, percentile 0.113660000 (date 2026-07-20)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 9dbf091da080508e9f632d307f357beb79a0766b 90e809376b0f0d1ddec2eec954aecdd2a5b40b0e git | Not specified |
| CNA | Linux | Linux | affected 9dbf091da080508e9f632d307f357beb79a0766b 8654b5e2617819ff4f7c78071dfd0275e971a9b6 git | Not specified |
| CNA | Linux | Linux | affected 9dbf091da080508e9f632d307f357beb79a0766b b64dd5f3b38911054cbcc570df617e3e8e75e562 git | Not specified |
| CNA | Linux | Linux | affected 9dbf091da080508e9f632d307f357beb79a0766b 31bbd4b87dd6701fa10e03ba7f6268e49e178d16 git | Not specified |
| CNA | Linux | Linux | affected 9dbf091da080508e9f632d307f357beb79a0766b 63203bd072b613c18c237b906b1c9d2dc4527337 git | Not specified |
| CNA | Linux | Linux | affected 9dbf091da080508e9f632d307f357beb79a0766b 15a0b3f33ffb6c78b3de6f69b026ceb09b973dd1 git | Not specified |
| CNA | Linux | Linux | affected 9dbf091da080508e9f632d307f357beb79a0766b cfc3283859cfdeacadf80d5e6880bdf871ffeaa6 git | Not specified |
| CNA | Linux | Linux | affected 9dbf091da080508e9f632d307f357beb79a0766b 6bdc3023d62ed5c7d591f0eb27a5adb37fb892ae git | Not specified |
| CNA | Linux | Linux | affected 3.9 | Not specified |
| CNA | Linux | Linux | unaffected 3.9 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.10.259 5.10.* semver | Not specified |
| CNA | Linux | Linux | unaffected 5.15.210 5.15.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.176 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.143 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.93 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.35 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.0.12 7.0.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.1 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/8654b5e2617819ff4f7c78071dfd0275e971a9b6 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/63203bd072b613c18c237b906b1c9d2dc4527337 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/cfc3283859cfdeacadf80d5e6880bdf871ffeaa6 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/15a0b3f33ffb6c78b3de6f69b026ceb09b973dd1 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/31bbd4b87dd6701fa10e03ba7f6268e49e178d16 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/b64dd5f3b38911054cbcc570df617e3e8e75e562 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/6bdc3023d62ed5c7d591f0eb27a5adb37fb892ae | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/90e809376b0f0d1ddec2eec954aecdd2a5b40b0e | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.