{"id":"CVE-2026-74683","state":"PUBLISHED","title":"Input: evdev - sanitize event type index when fetching event masks","description":"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.","publishedAt":"2026-08-22T15:32:50.192Z","updatedAt":"2026-08-25T05:23:19.336Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"06a16293f71927f756dcf37558a79c0b05a91641","status":"affected","lessThan":"c79b08d8fa230871a3634e34a66e591ac2d084ef","versionType":"git"},{"version":"06a16293f71927f756dcf37558a79c0b05a91641","status":"affected","lessThan":"f27fa9b39f925d26e034a1f382cb45523138f4ae","versionType":"git"},{"version":"06a16293f71927f756dcf37558a79c0b05a91641","status":"affected","lessThan":"f3fc329acad9a71b3c077237cbac20670d2358c8","versionType":"git"},{"version":"06a16293f71927f756dcf37558a79c0b05a91641","status":"affected","lessThan":"5db341189bb7ff041d570dbe36ecca7e32913927","versionType":"git"},{"version":"06a16293f71927f756dcf37558a79c0b05a91641","status":"affected","lessThan":"433913b4a92214d76e9f0c03ad9128fec943d5f8","versionType":"git"},{"version":"06a16293f71927f756dcf37558a79c0b05a91641","status":"affected","lessThan":"4034ef247a9dde3f56660b01f0c3280dac6b1274","versionType":"git"},{"version":"06a16293f71927f756dcf37558a79c0b05a91641","status":"affected","lessThan":"810e1883d4815f29c30d900ad7333d03cc2515d1","versionType":"git"},{"version":"06a16293f71927f756dcf37558a79c0b05a91641","status":"affected","lessThan":"3abd29c61d2ef37c4102cf755b18be53bb9dbea6","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/input/evdev.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.4","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.4","versionType":"semver"},{"version":"5.10.265","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.216","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.183","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.152","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.104","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.45","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.9","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/input/evdev.c"]}],"references":["https://git.kernel.org/stable/c/c79b08d8fa230871a3634e34a66e591ac2d084ef","https://git.kernel.org/stable/c/f27fa9b39f925d26e034a1f382cb45523138f4ae","https://git.kernel.org/stable/c/f3fc329acad9a71b3c077237cbac20670d2358c8","https://git.kernel.org/stable/c/5db341189bb7ff041d570dbe36ecca7e32913927","https://git.kernel.org/stable/c/433913b4a92214d76e9f0c03ad9128fec943d5f8","https://git.kernel.org/stable/c/4034ef247a9dde3f56660b01f0c3280dac6b1274","https://git.kernel.org/stable/c/810e1883d4815f29c30d900ad7333d03cc2515d1","https://git.kernel.org/stable/c/3abd29c61d2ef37c4102cf755b18be53bb9dbea6"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:58.252Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/74xxx/CVE-2026-74683.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-74683","state":"PUBLISHED","datePublished":"2026-08-22T15:32:50.192Z","dateUpdated":"2026-08-25T05:23:19.336Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-08-15T05:44:03.926Z"},"containers":{"cna":{"title":"Input: evdev - sanitize event type index when fetching event masks","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"06a16293f71927f756dcf37558a79c0b05a91641","status":"affected","lessThan":"c79b08d8fa230871a3634e34a66e591ac2d084ef","versionType":"git"},{"version":"06a16293f71927f756dcf37558a79c0b05a91641","status":"affected","lessThan":"f27fa9b39f925d26e034a1f382cb45523138f4ae","versionType":"git"},{"version":"06a16293f71927f756dcf37558a79c0b05a91641","status":"affected","lessThan":"f3fc329acad9a71b3c077237cbac20670d2358c8","versionType":"git"},{"version":"06a16293f71927f756dcf37558a79c0b05a91641","status":"affected","lessThan":"5db341189bb7ff041d570dbe36ecca7e32913927","versionType":"git"},{"version":"06a16293f71927f756dcf37558a79c0b05a91641","status":"affected","lessThan":"433913b4a92214d76e9f0c03ad9128fec943d5f8","versionType":"git"},{"version":"06a16293f71927f756dcf37558a79c0b05a91641","status":"affected","lessThan":"4034ef247a9dde3f56660b01f0c3280dac6b1274","versionType":"git"},{"version":"06a16293f71927f756dcf37558a79c0b05a91641","status":"affected","lessThan":"810e1883d4815f29c30d900ad7333d03cc2515d1","versionType":"git"},{"version":"06a16293f71927f756dcf37558a79c0b05a91641","status":"affected","lessThan":"3abd29c61d2ef37c4102cf755b18be53bb9dbea6","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/input/evdev.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.4","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.4","versionType":"semver"},{"version":"5.10.265","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.216","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.183","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.152","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.104","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.45","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.9","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/input/evdev.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/c79b08d8fa230871a3634e34a66e591ac2d084ef"},{"url":"https://git.kernel.org/stable/c/f27fa9b39f925d26e034a1f382cb45523138f4ae"},{"url":"https://git.kernel.org/stable/c/f3fc329acad9a71b3c077237cbac20670d2358c8"},{"url":"https://git.kernel.org/stable/c/5db341189bb7ff041d570dbe36ecca7e32913927"},{"url":"https://git.kernel.org/stable/c/433913b4a92214d76e9f0c03ad9128fec943d5f8"},{"url":"https://git.kernel.org/stable/c/4034ef247a9dde3f56660b01f0c3280dac6b1274"},{"url":"https://git.kernel.org/stable/c/810e1883d4815f29c30d900ad7333d03cc2515d1"},{"url":"https://git.kernel.org/stable/c/3abd29c61d2ef37c4102cf755b18be53bb9dbea6"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-25T05:23:19.336Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.4","versionEndExcluding":"5.10.265"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.4","versionEndExcluding":"5.15.216"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.4","versionEndExcluding":"6.1.183"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.4","versionEndExcluding":"6.6.152"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.4","versionEndExcluding":"6.12.104"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.4","versionEndExcluding":"6.18.45"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.4","versionEndExcluding":"7.1.9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.4","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}