CVE-2026-74683

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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": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/input/evdev.c"], "versions": [{"version": "06a16293f71927f756dcf37558a79c0b05a91641", "lessThan": "c79b08d8fa230871a3634e34a66e591ac2d084ef", "status": "affected", "versionType": "git"}, {"version": "06a16293f71927f756dcf37558a79c0b05a91641", "lessThan": "f27fa9b39f925d26e034a1f382cb45523138f4ae", "status": "affected", "versionType": "git"}, {"version": "06a16293f71927f756dcf37558a79c0b05a91641", "lessThan": "f3fc329acad9a71b3c077237cbac20670d2358c8", "status": "affected", "versionType": "git"}, {"version": "06a16293f71927f756dcf37558a79c0b05a91641", "lessThan": "5db341189bb7ff041d570dbe36ecca7e32913927", "status": "affected", "versionType": "git"}, {"version": "06a16293f71927f756dcf37558a79c0b05a91641", "lessThan": "433913b4a92214d76e9f0c03ad9128fec943d5f8", "status": "affected", "versionType": "git"}, {"version": "06a16293f71927f756dcf37558a79c0b05a91641", "lessThan": "4034ef247a9dde3f56660b01f0c3280dac6b1274", "status": "affected", "versionType": "git"}, {"version": "06a16293f71927f756dcf37558a79c0b05a91641", "lessThan": "810e1883d4815f29c30d900ad7333d03cc2515d1", "status": "affected", "versionType": "git"}, {"version": "06a16293f71927f756dcf37558a79c0b05a91641", "lessThan": "3abd29c61d2ef37c4102cf755b18be53bb9dbea6", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": 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"lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "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:*:*:*:*:*:*:*:*", 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"https://git.kernel.org/stable/c/3abd29c61d2ef37c4102cf755b18be53bb9dbea6"}], "title": "Input: evdev - sanitize event type index when fetching event masks", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-74683", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-11-06T17:01:28.399490Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-06T17:05:51.533Z"}}]}}

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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."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.265", "versionStartIncluding": "4.4"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.216", "versionStartIncluding": "4.4"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.183", "versionStartIncluding": "4.4"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.152", "versionStartIncluding": "4.4"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.104", "versionStartIncluding": "4.4"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.45", "versionStartIncluding": "4.4"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.1.9", "versionStartIncluding": "4.4"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.2", "versionStartIncluding": "4.4"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-25T05:23:19.336Z"}}}, "cveMetadata": {"cveId": "CVE-2026-74683", "state": "PUBLISHED", "dateUpdated": "2026-11-06T17:05:51.533Z", "dateReserved": "2026-08-15T05:44:03.926Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-08-22T15:32:50.192Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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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."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nInput: evdev - sanear el \u00edndice del tipo de evento al obtener m\u00e1scaras de evento\n\nEl \u00edndice del tipo de evento proporcionado por el usuario pasado a los ioctls EVIOCGMASK / EVIOCSMASK se utiliza para indexar el array est\u00e1tico counts en evdev_get_mask_cnt() y el array evmasks del cliente en evdev_get_mask().\n\nSi bien el tipo de evento est\u00e1 arquitect\u00f3nicamente limitado por EV_CNT, la ejecuci\u00f3n especulativa puede predecir err\u00f3neamente las comprobaciones de l\u00edmites y realizar cargas fuera de l\u00edmites.\n\nSanear el \u00edndice del tipo de evento en evdev_get_mask_cnt() sin ramificaciones usando array_index_mask_nospec(). Esto fija el \u00edndice a 0 para un acceso seguro al array y fuerza el recuento devuelto a 0 especulativamente cuando el \u00edndice est\u00e1 fuera de l\u00edmites.\n\nNo necesitamos llamadas adicionales a array_index_nospec() en evdev_get_mask() porque evdev_get_mask_cnt() fuerza especulativamente el recuento (y el xfer_size resultante) a 0 para tipos fuera de l\u00edmites, evitando cualquier acceso especulativo a la memoria al array evmasks del cliente."}], "id": "CVE-2026-74683", "lastModified": "2026-11-06T17:19:54.683", "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-74683", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-06T17:01:28.399490Z", "version": "2.0.3"}}]}, "published": "2026-08-22T16:16:42.617", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3abd29c61d2ef37c4102cf755b18be53bb9dbea6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4034ef247a9dde3f56660b01f0c3280dac6b1274"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/433913b4a92214d76e9f0c03ad9128fec943d5f8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5db341189bb7ff041d570dbe36ecca7e32913927"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/810e1883d4815f29c30d900ad7333d03cc2515d1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c79b08d8fa230871a3634e34a66e591ac2d084ef"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f27fa9b39f925d26e034a1f382cb45523138f4ae"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f3fc329acad9a71b3c077237cbac20670d2358c8"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Input: evdev - sanitize event type index when fetching event masks", "id": "2521364", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2521364"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-125", "details": ["A flaw was found in the Linux kernel's evdev component. A local user could provide a specially crafted event type index to the EVIOCGMASK or EVIOCSMASK ioctls. This could lead to speculative execution mispredicting bounds checks and performing out-of-bounds loads, potentially resulting in information disclosure."], "name": "CVE-2026-74683", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-22T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-74683\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-74683\nhttps://lore.kernel.org/linux-cve-announce/2026082232-CVE-2026-74683-a20b@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,c79b08d8fa230871a3634e34a66e591ac2d084ef)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,f27fa9b39f925d26e034a1f382cb45523138f4ae)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,f3fc329acad9a71b3c077237cbac20670d2358c8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,5db341189bb7ff041d570dbe36ecca7e32913927)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,433913b4a92214d76e9f0c03ad9128fec943d5f8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,4034ef247a9dde3f56660b01f0c3280dac6b1274)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,810e1883d4815f29c30d900ad7333d03cc2515d1)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,3abd29c61d2ef37c4102cf755b18be53bb9dbea6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,5.10.265)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,5.15.216)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,6.1.183)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,6.6.152)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,6.12.104)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,7.1.9)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[5.10.265,5.10.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[5.15.216,5.15.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.1.183,6.1.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.6.152,6.6.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.104,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.45,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1.9,7.1.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-08-22T18:15:03.691027+00:00", "updated": "2026-08-24T20:15:04.186567+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}