{"id":"CVE-2026-74683","summary":"Input: evdev - sanitize event type index when fetching event masks","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nInput: evdev - sanitize event type index when fetching event masks\n\nThe user-supplied event type index passed to EVIOCGMASK / EVIOCSMASK\nioctls is used to index the static counts array in evdev_get_mask_cnt()\nand client evmasks array in evdev_get_mask().\n\nWhile the event type is architecturally bounded by EV_CNT, speculative\nexecution may mispredict bounds checks and perform out-of-bounds loads.\n\nSanitize the event type index in evdev_get_mask_cnt() branchlessly using\narray_index_mask_nospec(). This clamps the index to 0 for safe array\naccess and forces the returned count to 0 speculatively when the index\nis out of bounds.\n\nWe do not need additional array_index_nospec() calls in evdev_get_mask()\nbecause evdev_get_mask_cnt() speculatively forces the count (and\nresulting xfer_size) to 0 for out-of-bounds types, preventing any\nspeculative memory access to client evmasks array.","modified":"2026-08-26T03:49:54.955066134Z","published":"2026-08-22T15:32:50.192Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74683.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/3abd29c61d2ef37c4102cf755b18be53bb9dbea6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4034ef247a9dde3f56660b01f0c3280dac6b1274"},{"type":"WEB","url":"https://git.kernel.org/stable/c/433913b4a92214d76e9f0c03ad9128fec943d5f8"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5db341189bb7ff041d570dbe36ecca7e32913927"},{"type":"WEB","url":"https://git.kernel.org/stable/c/810e1883d4815f29c30d900ad7333d03cc2515d1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c79b08d8fa230871a3634e34a66e591ac2d084ef"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f27fa9b39f925d26e034a1f382cb45523138f4ae"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f3fc329acad9a71b3c077237cbac20670d2358c8"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74683.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74683"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"06a16293f71927f756dcf37558a79c0b05a91641"},{"fixed":"c79b08d8fa230871a3634e34a66e591ac2d084ef"},{"fixed":"f27fa9b39f925d26e034a1f382cb45523138f4ae"},{"fixed":"f3fc329acad9a71b3c077237cbac20670d2358c8"},{"fixed":"5db341189bb7ff041d570dbe36ecca7e32913927"},{"fixed":"433913b4a92214d76e9f0c03ad9128fec943d5f8"},{"fixed":"4034ef247a9dde3f56660b01f0c3280dac6b1274"},{"fixed":"810e1883d4815f29c30d900ad7333d03cc2515d1"},{"fixed":"3abd29c61d2ef37c4102cf755b18be53bb9dbea6"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-74683.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.4.0"},{"fixed":"5.10.265"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.216"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.183"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.152"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.104"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.45"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.9"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-74683.json"}}],"schema_version":"1.9.0"}