CVE-2026-63967

Summary

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 Software

VendorProductVersion RangeStatus
LinuxLinuxc14edb4d0bdc53f969ea84c7f384472c28b1a9f8 < ff8d3c088b77b11782f2c3b97e37425be050e8deaffected
LinuxLinuxc14edb4d0bdc53f969ea84c7f384472c28b1a9f8 < fe1a7f99e72ebd2880515332b79b8c256be22acaaffected
LinuxLinuxc14edb4d0bdc53f969ea84c7f384472c28b1a9f8 < babf1943a40bb5669db57d30ca16c22504b18e07affected
LinuxLinuxc14edb4d0bdc53f969ea84c7f384472c28b1a9f8 < d42ac0bfb6a16617c62a59d53706579c7fadbfa6affected
LinuxLinuxc14edb4d0bdc53f969ea84c7f384472c28b1a9f8 < 3147b303b8c7d9f91da4b849ece33b45048f5eafaffected
LinuxLinuxc14edb4d0bdc53f969ea84c7f384472c28b1a9f8 < e6bb3a49c5f9de870ea95e69775df785728e3366affected
LinuxLinuxc14edb4d0bdc53f969ea84c7f384472c28b1a9f8 < 890d0312d5f94be43eac21f5a34d3bccc60d051baffected
LinuxLinuxc14edb4d0bdc53f969ea84c7f384472c28b1a9f8 < c9d8e9adaa63150ef7e833480b799d0bab83a276affected
LinuxLinuxa42ca3b182ccb766666a0be1053921cba190e2deaffected
LinuxLinux5.9.5 < 5.10affected
LinuxLinux5.10affected
LinuxLinux0 < 5.10unaffected
LinuxLinux5.10.259 <= 5.10.*unaffected
LinuxLinux5.15.210 <= 5.15.*unaffected
LinuxLinux6.1.176 <= 6.1.*unaffected
LinuxLinux6.6.143 <= 6.6.*unaffected
LinuxLinux6.12.93 <= 6.12.*unaffected
LinuxLinux6.18.35 <= 6.18.*unaffected
LinuxLinux7.0.12 <= 7.0.*unaffected
LinuxLinux7.1 <= *unaffected

Weaknesses

References