{"api_version":"1","generated_at":"2026-07-23T21:21:22+00:00","cve":"CVE-2026-63967","urls":{"html":"https://cve.report/CVE-2026-63967","api":"https://cve.report/api/cve/CVE-2026-63967.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-63967","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-63967"},"summary":{"title":"iio: imu: st_lsm6dsx: fix stack leak in tagged FIFO buffer","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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-07-19 16:17:15","updated_at":"2026-07-19 16:17:15"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/890d0312d5f94be43eac21f5a34d3bccc60d051b","name":"https://git.kernel.org/stable/c/890d0312d5f94be43eac21f5a34d3bccc60d051b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d42ac0bfb6a16617c62a59d53706579c7fadbfa6","name":"https://git.kernel.org/stable/c/d42ac0bfb6a16617c62a59d53706579c7fadbfa6","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/babf1943a40bb5669db57d30ca16c22504b18e07","name":"https://git.kernel.org/stable/c/babf1943a40bb5669db57d30ca16c22504b18e07","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e6bb3a49c5f9de870ea95e69775df785728e3366","name":"https://git.kernel.org/stable/c/e6bb3a49c5f9de870ea95e69775df785728e3366","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/fe1a7f99e72ebd2880515332b79b8c256be22aca","name":"https://git.kernel.org/stable/c/fe1a7f99e72ebd2880515332b79b8c256be22aca","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/3147b303b8c7d9f91da4b849ece33b45048f5eaf","name":"https://git.kernel.org/stable/c/3147b303b8c7d9f91da4b849ece33b45048f5eaf","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c9d8e9adaa63150ef7e833480b799d0bab83a276","name":"https://git.kernel.org/stable/c/c9d8e9adaa63150ef7e833480b799d0bab83a276","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ff8d3c088b77b11782f2c3b97e37425be050e8de","name":"https://git.kernel.org/stable/c/ff8d3c088b77b11782f2c3b97e37425be050e8de","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-63967","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-63967","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c14edb4d0bdc53f969ea84c7f384472c28b1a9f8 ff8d3c088b77b11782f2c3b97e37425be050e8de git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c14edb4d0bdc53f969ea84c7f384472c28b1a9f8 fe1a7f99e72ebd2880515332b79b8c256be22aca git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c14edb4d0bdc53f969ea84c7f384472c28b1a9f8 babf1943a40bb5669db57d30ca16c22504b18e07 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c14edb4d0bdc53f969ea84c7f384472c28b1a9f8 d42ac0bfb6a16617c62a59d53706579c7fadbfa6 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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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."}],"providerMetadata":{"dateUpdated":"2026-07-19T14:55:54.999Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/ff8d3c088b77b11782f2c3b97e37425be050e8de"},{"url":"https://git.kernel.org/stable/c/fe1a7f99e72ebd2880515332b79b8c256be22aca"},{"url":"https://git.kernel.org/stable/c/babf1943a40bb5669db57d30ca16c22504b18e07"},{"url":"https://git.kernel.org/stable/c/d42ac0bfb6a16617c62a59d53706579c7fadbfa6"},{"url":"https://git.kernel.org/stable/c/3147b303b8c7d9f91da4b849ece33b45048f5eaf"},{"url":"https://git.kernel.org/stable/c/e6bb3a49c5f9de870ea95e69775df785728e3366"},{"url":"https://git.kernel.org/stable/c/890d0312d5f94be43eac21f5a34d3bccc60d051b"},{"url":"https://git.kernel.org/stable/c/c9d8e9adaa63150ef7e833480b799d0bab83a276"}],"title":"iio: imu: st_lsm6dsx: fix stack leak in tagged FIFO buffer","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-63967","datePublished":"2026-07-19T14:55:54.999Z","dateReserved":"2026-07-19T07:54:57.024Z","dateUpdated":"2026-07-19T14:55:54.999Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-07-19 16:17:15","lastModifiedDate":"2026-07-19 16:17:15","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"63967","Ordinal":"1","Title":"iio: imu: st_lsm6dsx: fix stack leak in tagged FIFO buffer","CVE":"CVE-2026-63967","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"63967","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"iio: imu: st_lsm6dsx: fix stack leak in tagged FIFO buffer"}]}}}