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vuln-cve/data/2025/38xxx/CVE-2025-38494.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2025-38494",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2025-04-16T04:51:24.022Z",
"datePublished": "2025-07-28T11:22:03.180Z",
"dateUpdated": "2026-08-05T12:02:23.039Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux",
"dateUpdated": "2026-08-05T12:02:23.039Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: core: do not bypass hid_hw_raw_request\n\nhid_hw_raw_request() is actually useful to ensure the provided buffer\nand length are valid. Directly calling in the low level transport driver\nfunction bypassed those checks and allowed invalid paramto be used."
}
],
"metrics": [
{
"cvssV3_1": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"baseScore": 7.8,
"baseSeverity": "HIGH"
},
"scenarios": [
{
"lang": "en",
"value": "AV:L - The attacker supplies the malicious HID report descriptor through a local interface — `/dev/uhid` (UHID_CREATE2) — and triggers `hid_hw_request()` locally via device connect, an EV_LED write, or a force-feedback ioctl on `/dev/input/eventX`; no network or adjacent-network path is involved.\nAC:L - The attacker fully controls both the report descriptor that produces the degenerate `hid_report_len() == 0` value and the moment the request is issued, so the unvalidated length reaches the transport driver deterministically with no race or environmental precondition.\nPR:L - Only access to a HID char device is needed — `/dev/uhid` and `/dev/input/event*`/`hidraw` nodes are granted to the logged-in seat user via udev `uaccess` tagging on desktop and Android-class systems, and are routinely exposed inside privileged containers, so no real root in the initial namespace is required.\nUI:N - The attacker's own process creates the uhid device and issues the triggering request; `hidinput_change_resolution_multipliers()` fires the GET_REPORT automatically at device connect with no action from any other user.\nS:U - The corrupted memory and the bypassed validation are both inside the kernel's HID subsystem, managed by the same security authority; no hypervisor, IOMMU, or sandbox boundary is crossed.\nC:H - The unchecked `len == 0` causes a `size_t` underflow (`count--`) in transport handlers such as `i2c_hid_get_raw_report()` and `usbhid_get_raw_report()`, so an over-long response is copied out and then passed to `hid_input_report()` with an inflated size, exposing adjacent heap contents through input/hidraw data readable from userspace.\nI:H - The same underflow makes `i2c_hid_get_report()` memcpy up to `ihid->bufsize` bytes of device-controlled data into a 7-byte `hid_alloc_report_buf()` allocation — a controlled heap out-of-bounds write usable as a control-flow-hijack primitive; the patch additionally restores the bypassed HID-BPF request-filtering hook.\nA:H - Passing an invalid length into the low-level transport produces heap out-of-bounds reads and writes that reliably trigger KASAN reports, slab corruption, and kernel oops/panic."
}
]
}
],
"affected": [
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/hid/hid-core.c"
],
"versions": [
{
"version": "4fa5a7f76cc7b6ac87f57741edd2b124851d119f",
"lessThan": "dd8e8314f2ce225dade5248dcfb9e2ac0edda624",
"status": "affected",
"versionType": "git"
},
{
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"lessThan": "40e25aa7e4e0f2440c73a683ee448e41c7c344ed",
"status": "affected",
"versionType": "git"
},
{
"version": "4fa5a7f76cc7b6ac87f57741edd2b124851d119f",
"lessThan": "f10923b8d32a473b229477b63f23bbd72b1e9910",
"status": "affected",
"versionType": "git"
},
{
"version": "4fa5a7f76cc7b6ac87f57741edd2b124851d119f",
"lessThan": "a62a895edb2bfebffa865b5129a66e3b4287f34f",
"status": "affected",
"versionType": "git"
},
{
"version": "4fa5a7f76cc7b6ac87f57741edd2b124851d119f",
"lessThan": "0e5017d84d650ca0eeaf4a3fe9264c5dbc886b81",
"status": "affected",
"versionType": "git"
},
{
"version": "4fa5a7f76cc7b6ac87f57741edd2b124851d119f",
"lessThan": "d18f63e848840100dbc351a82e7042eac5a28cf5",
"status": "affected",
"versionType": "git"
},
{
"version": "4fa5a7f76cc7b6ac87f57741edd2b124851d119f",
"lessThan": "19d1314d46c0d8a5c08ab53ddeb62280c77698c0",
"status": "affected",
"versionType": "git"
},
{
"version": "4fa5a7f76cc7b6ac87f57741edd2b124851d119f",
"lessThan": "c2ca42f190b6714d6c481dfd3d9b62ea091c946b",
"status": "affected",
"versionType": "git"
}
]
},
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/hid/hid-core.c"
],
"versions": [
{
"version": "3.15",
"status": "affected"
},
{
"version": "0",
"lessThan": "3.15",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.4.297",
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.10.241",
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "5.15.190",
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.1.147",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.6.100",
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.12.40",
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.15.8",
"lessThanOrEqual": "6.15.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.16",
"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": "3.15",
"versionEndExcluding": "5.4.297"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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},
{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "3.15",
"versionEndExcluding": "6.12.40"
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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}
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],
"references": [
{
"url": "https://git.kernel.org/stable/c/dd8e8314f2ce225dade5248dcfb9e2ac0edda624"
},
{
"url": "https://git.kernel.org/stable/c/40e25aa7e4e0f2440c73a683ee448e41c7c344ed"
},
{
"url": "https://git.kernel.org/stable/c/f10923b8d32a473b229477b63f23bbd72b1e9910"
},
{
"url": "https://git.kernel.org/stable/c/a62a895edb2bfebffa865b5129a66e3b4287f34f"
},
{
"url": "https://git.kernel.org/stable/c/0e5017d84d650ca0eeaf4a3fe9264c5dbc886b81"
},
{
"url": "https://git.kernel.org/stable/c/d18f63e848840100dbc351a82e7042eac5a28cf5"
},
{
"url": "https://git.kernel.org/stable/c/19d1314d46c0d8a5c08ab53ddeb62280c77698c0"
},
{
"url": "https://git.kernel.org/stable/c/c2ca42f190b6714d6c481dfd3d9b62ea091c946b"
}
],
"title": "HID: core: do not bypass hid_hw_raw_request",
"x_generator": {
"engine": "bippy-1.2.0"
}
},
"adp": [
{
"title": "CVE Program Container",
"references": [
{
"url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"
},
{
"url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"
}
],
"providerMetadata": {
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE",
"dateUpdated": "2025-11-03T17:39:01.805Z"
}
}
]
}
}
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