CVE-2026-63967
iio: imu: st_lsm6dsx: fix stack leak in tagged FIFO buffer
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Description
In the Linux kernel, the following vulnerability has been resolved: iio: imu: st_lsm6dsx: fix stack leak in tagged FIFO buffer The tagged FIFO path declares iio_buff on the stack with __aligned(8) but no initializer, but there is a hole in the structure, which will then leak to userspace as ST_LSM6DSX_SAMPLE_SIZE bytes (6) will be copied, but the space between that and the timestamp are not initialized. Commit c14edb4d0bdc ("iio:imu:st_lsm6dsx Fix alignment and data leak issues") moved the untagged FIFO path to a kzalloc'd buffer in hw->scan, but for the tagged path it only added the alignment qualifier and not the initializer :( Fix this by just zero-initializing the structure on the stack.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- https://git.kernel.org/stable/c/ff8d3c088b77b11782f2c3b97e37425be050e8de
- https://git.kernel.org/stable/c/fe1a7f99e72ebd2880515332b79b8c256be22aca
- https://git.kernel.org/stable/c/babf1943a40bb5669db57d30ca16c22504b18e07
- https://git.kernel.org/stable/c/d42ac0bfb6a16617c62a59d53706579c7fadbfa6
- https://git.kernel.org/stable/c/3147b303b8c7d9f91da4b849ece33b45048f5eaf
References (8)
CVSS
- Attack Vector
- LOCAL
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- HIGH
- Availability
- HIGH
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