{"id":"CVE-2025-38494","state":"PUBLISHED","title":"HID: core: do not bypass hid_hw_raw_request","description":"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.","publishedAt":"2025-07-28T11:22:03.180Z","updatedAt":"2026-08-05T12:02:23.039Z","severity":{"score":7.8,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"4fa5a7f76cc7b6ac87f57741edd2b124851d119f","status":"affected","lessThan":"dd8e8314f2ce225dade5248dcfb9e2ac0edda624","versionType":"git"},{"version":"4fa5a7f76cc7b6ac87f57741edd2b124851d119f","status":"affected","lessThan":"40e25aa7e4e0f2440c73a683ee448e41c7c344ed","versionType":"git"},{"version":"4fa5a7f76cc7b6ac87f57741edd2b124851d119f","status":"affected","lessThan":"f10923b8d32a473b229477b63f23bbd72b1e9910","versionType":"git"},{"version":"4fa5a7f76cc7b6ac87f57741edd2b124851d119f","status":"affected","lessThan":"a62a895edb2bfebffa865b5129a66e3b4287f34f","versionType":"git"},{"version":"4fa5a7f76cc7b6ac87f57741edd2b124851d119f","status":"affected","lessThan":"0e5017d84d650ca0eeaf4a3fe9264c5dbc886b81","versionType":"git"},{"version":"4fa5a7f76cc7b6ac87f57741edd2b124851d119f","status":"affected","lessThan":"d18f63e848840100dbc351a82e7042eac5a28cf5","versionType":"git"},{"version":"4fa5a7f76cc7b6ac87f57741edd2b124851d119f","status":"affected","lessThan":"19d1314d46c0d8a5c08ab53ddeb62280c77698c0","versionType":"git"},{"version":"4fa5a7f76cc7b6ac87f57741edd2b124851d119f","status":"affected","lessThan":"c2ca42f190b6714d6c481dfd3d9b62ea091c946b","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hid/hid-core.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.15","versionType":"semver"},{"version":"5.4.297","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.241","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.190","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.147","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.100","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.40","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.15.8","status":"unaffected","lessThanOrEqual":"6.15.*","versionType":"semver"},{"version":"6.16","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hid/hid-core.c"]}],"references":["https://git.kernel.org/stable/c/dd8e8314f2ce225dade5248dcfb9e2ac0edda624","https://git.kernel.org/stable/c/40e25aa7e4e0f2440c73a683ee448e41c7c344ed","https://git.kernel.org/stable/c/f10923b8d32a473b229477b63f23bbd72b1e9910","https://git.kernel.org/stable/c/a62a895edb2bfebffa865b5129a66e3b4287f34f","https://git.kernel.org/stable/c/0e5017d84d650ca0eeaf4a3fe9264c5dbc886b81","https://git.kernel.org/stable/c/d18f63e848840100dbc351a82e7042eac5a28cf5","https://git.kernel.org/stable/c/19d1314d46c0d8a5c08ab53ddeb62280c77698c0","https://git.kernel.org/stable/c/c2ca42f190b6714d6c481dfd3d9b62ea091c946b","https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html","https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"],"weaknesses":[],"ingestedAt":"2026-10-29T20:09:09.358Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/38xxx/CVE-2025-38494.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-38494","state":"PUBLISHED","datePublished":"2025-07-28T11:22:03.180Z","dateUpdated":"2026-08-05T12:02:23.039Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-04-16T04:51:24.022Z"},"containers":{"cna":{"title":"HID: core: do not bypass hid_hw_raw_request","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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"4fa5a7f76cc7b6ac87f57741edd2b124851d119f","status":"affected","lessThan":"dd8e8314f2ce225dade5248dcfb9e2ac0edda624","versionType":"git"},{"version":"4fa5a7f76cc7b6ac87f57741edd2b124851d119f","status":"affected","lessThan":"40e25aa7e4e0f2440c73a683ee448e41c7c344ed","versionType":"git"},{"version":"4fa5a7f76cc7b6ac87f57741edd2b124851d119f","status":"affected","lessThan":"f10923b8d32a473b229477b63f23bbd72b1e9910","versionType":"git"},{"version":"4fa5a7f76cc7b6ac87f57741edd2b124851d119f","status":"affected","lessThan":"a62a895edb2bfebffa865b5129a66e3b4287f34f","versionType":"git"},{"version":"4fa5a7f76cc7b6ac87f57741edd2b124851d119f","status":"affected","lessThan":"0e5017d84d650ca0eeaf4a3fe9264c5dbc886b81","versionType":"git"},{"version":"4fa5a7f76cc7b6ac87f57741edd2b124851d119f","status":"affected","lessThan":"d18f63e848840100dbc351a82e7042eac5a28cf5","versionType":"git"},{"version":"4fa5a7f76cc7b6ac87f57741edd2b124851d119f","status":"affected","lessThan":"19d1314d46c0d8a5c08ab53ddeb62280c77698c0","versionType":"git"},{"version":"4fa5a7f76cc7b6ac87f57741edd2b124851d119f","status":"affected","lessThan":"c2ca42f190b6714d6c481dfd3d9b62ea091c946b","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hid/hid-core.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.15","versionType":"semver"},{"version":"5.4.297","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.241","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.190","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.147","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.100","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.40","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.15.8","status":"unaffected","lessThanOrEqual":"6.15.*","versionType":"semver"},{"version":"6.16","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hid/hid-core.c"]}],"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"}],"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."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-05T12:02:23.039Z"},"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:*:*:*:*:*:*:*:*","versionStartIncluding":"3.15","versionEndExcluding":"5.10.241"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.15","versionEndExcluding":"5.15.190"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.15","versionEndExcluding":"6.1.147"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.15","versionEndExcluding":"6.6.100"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.15","versionEndExcluding":"6.12.40"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.15","versionEndExcluding":"6.15.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.15","versionEndExcluding":"6.16"}]}]}],"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":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2025-11-03T17:39:01.805Z"}}]}}}