{"cve":"CVE-2026-63967","nvd":{"published":"2026-07-19T16:17:15.700","modified":"2026-10-30T17:25:05.780","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\niio: imu: st_lsm6dsx: fix stack leak in tagged FIFO buffer\n\nThe tagged FIFO path declares iio_buff on the stack with __aligned(8)\nbut no initializer, but there is a hole in the structure, which will\nthen leak to userspace as ST_LSM6DSX_SAMPLE_SIZE bytes (6) will be\ncopied, but the space between that and the timestamp are not\ninitialized.\n\nCommit c14edb4d0bdc (\"iio:imu:st_lsm6dsx Fix alignment and data leak\nissues\") moved the untagged FIFO path to a kzalloc'd buffer in hw->scan,\nbut for the tagged path it only added the alignment qualifier and not\nthe initializer :(\n\nFix this by just zero-initializing the structure on the stack.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8},"cwes":["CWE-787"],"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"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-30T17:45:53.525042316+00:00"},"epss":{"cve":"CVE-2026-63967","score":0.00211,"percentile":0.11342,"date":"2026-10-30"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}