{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-23178", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-01-13T15:37:45.984Z", "datePublished": "2026-02-14T16:27:10.108Z", "dateUpdated": "2026-08-05T12:20:29.229Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:20:29.229Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: i2c-hid: fix potential buffer overflow in i2c_hid_get_report()\n\n`i2c_hid_xfer` is used to read `recv_len + sizeof(__le16)` bytes of data\ninto `ihid->rawbuf`.\n\nThe former can come from the userspace in the hidraw driver and is only\nbounded by HID_MAX_BUFFER_SIZE(16384) by default (unless we also set\n`max_buffer_size` field of `struct hid_ll_driver` which we do not).\n\nThe latter has size determined at runtime by the maximum size of\ndifferent report types you could receive on any particular device and\ncan be a much smaller value.\n\nFix this by truncating `recv_len` to `ihid->bufsize - sizeof(__le16)`.\n\nThe impact is low since access to hidraw devices requires root." } ], "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 vulnerability is triggered through the hidraw ioctl interface (/dev/hidrawN), requiring local system access to open the device file and issue an ioctl. I2C-HID devices are locally attached hardware (touchpads, touchscreens).\nAC:L - The attacker simply opens a hidraw device and issues a HIDIOCGFEATURE/HIDIOCGINPUT ioctl with a large size parameter. No race condition, special memory layout, or non-default configuration is needed to trigger the overflow.\nPR:L - While hidraw devices default to 0600 root:root, on desktop Linux systems with systemd/logind, udev uaccess rules grant some hidraw device access to the physically logged-in user without root privileges. On shared workstations or kiosks, a non-root user could trigger this.\nUI:N - No user interaction is required. The attacker opens the hidraw device file and issues the ioctl directly.\nS:U - The vulnerability is in the kernel and the impact (heap corruption) affects the kernel itself. No security boundary crossing (like VM escape) occurs.\nC:H - This is a heap buffer overflow of up to ~16KB past the allocated buffer. Heap corruption of this magnitude can be leveraged to read adjacent kernel heap objects, potentially disclosing sensitive kernel memory.\nI:H - The out-of-bounds write corrupts adjacent kernel heap objects. While the overflow content comes from the I2C device rather than being directly attacker-controlled, a 16KB heap overflow can corrupt critical kernel data structures, potentially enabling code execution through heap grooming techniques.\nA:H - A heap buffer overflow of up to ~16KB will corrupt adjacent kernel heap objects, reliably causing kernel crashes (oops/panic) from corrupted metadata or invalid pointer dereferences." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/hid/i2c-hid/i2c-hid-core.c" ], "versions": [ { "version": "85df713377ddc0482071c3e6b64c37bd1e48f1f1", "lessThan": "f9c9ad89d845f88a1509e9d672f65d234425fde9", "status": "affected", "versionType": "git" }, { "version": "85df713377ddc0482071c3e6b64c37bd1e48f1f1", "lessThan": "cff3f619fd1cb40cdd89971df9001f075613d219", "status": "affected", "versionType": "git" }, { "version": "85df713377ddc0482071c3e6b64c37bd1e48f1f1", "lessThan": "786ec171788bdf9dda38789163f1b1fbb47f2d1e", "status": "affected", "versionType": "git" }, { "version": "85df713377ddc0482071c3e6b64c37bd1e48f1f1", "lessThan": "2124279f1f8c32c1646ce98e75a1a39b23b7db76", "status": "affected", "versionType": "git" }, { "version": "85df713377ddc0482071c3e6b64c37bd1e48f1f1", "lessThan": "2497ff38c530b1af0df5130ca9f5ab22c5e92f29", "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/i2c-hid/i2c-hid-core.c" ], "versions": [ { "version": "5.18", "status": "affected" }, { "version": "0", "lessThan": "5.18", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.163", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.124", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.70", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.10", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.19", "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": "5.18", "versionEndExcluding": "6.1.163" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.6.124" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.12.70" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.18.10" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18", "versionEndExcluding": "6.19" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/f9c9ad89d845f88a1509e9d672f65d234425fde9" }, { "url": "https://git.kernel.org/stable/c/cff3f619fd1cb40cdd89971df9001f075613d219" }, { "url": "https://git.kernel.org/stable/c/786ec171788bdf9dda38789163f1b1fbb47f2d1e" }, { "url": "https://git.kernel.org/stable/c/2124279f1f8c32c1646ce98e75a1a39b23b7db76" }, { "url": "https://git.kernel.org/stable/c/2497ff38c530b1af0df5130ca9f5ab22c5e92f29" } ], "title": "HID: i2c-hid: fix potential buffer overflow in i2c_hid_get_report()", "x_generator": { "engine": "bippy-1.2.0" } } } }