CVE-2026-63967

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.

References

• https://git.kernel.org/stable/c/3147b303b8c7d9f91da4b849ece33b45048f5eaf
• https://git.kernel.org/stable/c/890d0312d5f94be43eac21f5a34d3bccc60d051b
• https://git.kernel.org/stable/c/babf1943a40bb5669db57d30ca16c22504b18e07
• https://git.kernel.org/stable/c/c9d8e9adaa63150ef7e833480b799d0bab83a276
• https://git.kernel.org/stable/c/d42ac0bfb6a16617c62a59d53706579c7fadbfa6