CVE-2026-74683 (GCVE-0-2026-74683)
Vulnerability from cvelistv5 – Published: 2026-08-22 15:32 – Updated: 2026-08-25 05:23
VLAI
EPSS
VEX
Title
Input: evdev - sanitize event type index when fetching event masks
Summary
In the Linux kernel, the following vulnerability has been resolved:
Input: evdev - sanitize event type index when fetching event masks
The user-supplied event type index passed to EVIOCGMASK / EVIOCSMASK
ioctls is used to index the static counts array in evdev_get_mask_cnt()
and client evmasks array in evdev_get_mask().
While the event type is architecturally bounded by EV_CNT, speculative
execution may mispredict bounds checks and perform out-of-bounds loads.
Sanitize the event type index in evdev_get_mask_cnt() branchlessly using
array_index_mask_nospec(). This clamps the index to 0 for safe array
access and forces the returned count to 0 speculatively when the index
is out of bounds.
We do not need additional array_index_nospec() calls in evdev_get_mask()
because evdev_get_mask_cnt() speculatively forces the count (and
resulting xfer_size) to 0 for out-of-bounds types, preventing any
speculative memory access to client evmasks array.
Severity
No CVSS data available.
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
06a16293f71927f756dcf37558a79c0b05a91641 , < c79b08d8fa230871a3634e34a66e591ac2d084ef
(git)
Affected: 06a16293f71927f756dcf37558a79c0b05a91641 , < f27fa9b39f925d26e034a1f382cb45523138f4ae (git) Affected: 06a16293f71927f756dcf37558a79c0b05a91641 , < f3fc329acad9a71b3c077237cbac20670d2358c8 (git) Affected: 06a16293f71927f756dcf37558a79c0b05a91641 , < 5db341189bb7ff041d570dbe36ecca7e32913927 (git) Affected: 06a16293f71927f756dcf37558a79c0b05a91641 , < 433913b4a92214d76e9f0c03ad9128fec943d5f8 (git) Affected: 06a16293f71927f756dcf37558a79c0b05a91641 , < 4034ef247a9dde3f56660b01f0c3280dac6b1274 (git) Affected: 06a16293f71927f756dcf37558a79c0b05a91641 , < 810e1883d4815f29c30d900ad7333d03cc2515d1 (git) Affected: 06a16293f71927f756dcf37558a79c0b05a91641 , < 3abd29c61d2ef37c4102cf755b18be53bb9dbea6 (git) |
guessed | |
| Linux | Linux |
Affected:
4.4
Unaffected: 0 , < 4.4 (semver) Unaffected: 5.10.265 , ≤ 5.10.* (semver) Unaffected: 5.15.216 , ≤ 5.15.* (semver) Unaffected: 6.1.183 , ≤ 6.1.* (semver) Unaffected: 6.6.152 , ≤ 6.6.* (semver) Unaffected: 6.12.104 , ≤ 6.12.* (semver) Unaffected: 6.18.45 , ≤ 6.18.* (semver) Unaffected: 7.1.9 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
guessed |
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},
{
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"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "5.10.265",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.216",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.183",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.152",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.104",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.45",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.9",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
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"versionEndExcluding": "5.10.265",
"versionStartIncluding": "4.4",
"vulnerable": true
},
{
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"versionEndExcluding": "5.15.216",
"versionStartIncluding": "4.4",
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},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.183",
"versionStartIncluding": "4.4",
"vulnerable": true
},
{
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{
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},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.45",
"versionStartIncluding": "4.4",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.1.9",
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{
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}
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"negate": false,
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],
"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."
}
],
"providerMetadata": {
"dateUpdated": "2026-08-25T05:23:19.336Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"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"
}
],
"title": "Input: evdev - sanitize event type index when fetching event masks",
"x_generator": {
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}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-74683",
"datePublished": "2026-08-22T15:32:50.192Z",
"dateReserved": "2026-08-15T05:44:03.926Z",
"dateUpdated": "2026-08-25T05:23:19.336Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-74683",
"date": "2026-10-15",
"epss": "0.0019",
"percentile": "0.08083"
},
"microsoft_vex": {
"current_release_date": "2026-09-25T02:15:15.000Z",
"cve": "CVE-2026-74683",
"id": "msrc_CVE-2026-74683",
"initial_release_date": "2026-08-24T01:09:43.000Z",
"product_status:fixed": "1",
"product_status:known_affected": "1",
"source": "Microsoft CSAF VEX",
"status": "final",
"title": "Input: evdev - sanitize event type index when fetching event masks",
"url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-74683.json",
"version": "4"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
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"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/input/evdev.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "c79b08d8fa230871a3634e34a66e591ac2d084ef",
"status": "affected",
"version": "06a16293f71927f756dcf37558a79c0b05a91641",
"versionType": "git"
},
{
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"versionType": "git"
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"versionType": "git"
},
{
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"version": "06a16293f71927f756dcf37558a79c0b05a91641",
"versionType": "git"
},
{
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"status": "affected",
"version": "06a16293f71927f756dcf37558a79c0b05a91641",
"versionType": "git"
},
{
"lessThan": "4034ef247a9dde3f56660b01f0c3280dac6b1274",
"status": "affected",
"version": "06a16293f71927f756dcf37558a79c0b05a91641",
"versionType": "git"
},
{
"lessThan": "810e1883d4815f29c30d900ad7333d03cc2515d1",
"status": "affected",
"version": "06a16293f71927f756dcf37558a79c0b05a91641",
"versionType": "git"
},
{
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"status": "affected",
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"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/input/evdev.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "4.4"
},
{
"lessThan": "4.4",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.265",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.216",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.183",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.152",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.104",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.45",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.9",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"cveTags": [],
"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."
},
{
"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": "2026-10-14T13:10:00.187",
"metrics": {},
"published": "2026-08-22T16:16:42.617",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/3abd29c61d2ef37c4102cf755b18be53bb9dbea6"
},
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/4034ef247a9dde3f56660b01f0c3280dac6b1274"
},
{
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"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"
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-08-24T09:21:44+00:00",
"cve": "CVE-2026-74683",
"id": "CVE-2026-74683",
"initial_release_date": "2026-08-22T00:00:00+00:00",
"product_status:known_affected": "274",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: Input: evdev - sanitize event type index when fetching event masks",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74683.json",
"version": "3"
}
}
}
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.