CVE-2026-23178 (GCVE-0-2026-23178)

Vulnerability from cvelistv5 – Published: 2026-02-14 16:27 – Updated: 2026-10-19 18:25
VLAI
Title
HID: i2c-hid: fix potential buffer overflow in i2c_hid_get_report()
Summary
In the Linux kernel, the following vulnerability has been resolved: HID: i2c-hid: fix potential buffer overflow in i2c_hid_get_report() `i2c_hid_xfer` is used to read `recv_len + sizeof(__le16)` bytes of data into `ihid->rawbuf`. The former can come from the userspace in the hidraw driver and is only bounded by HID_MAX_BUFFER_SIZE(16384) by default (unless we also set `max_buffer_size` field of `struct hid_ll_driver` which we do not). The latter has size determined at runtime by the maximum size of different report types you could receive on any particular device and can be a much smaller value. Fix this by truncating `recv_len` to `ihid->bufsize - sizeof(__le16)`. The impact is low since access to hidraw devices requires root.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-16 15:06 UTC
CWE
  • CWE-122 - Heap-based Buffer Overflow
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7018 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 85df713377ddc0482071c3e6b64c37bd1e48f1f1 , < f9c9ad89d845f88a1509e9d672f65d234425fde9 (git)
Affected: 85df713377ddc0482071c3e6b64c37bd1e48f1f1 , < cff3f619fd1cb40cdd89971df9001f075613d219 (git)
Affected: 85df713377ddc0482071c3e6b64c37bd1e48f1f1 , < 786ec171788bdf9dda38789163f1b1fbb47f2d1e (git)
Affected: 85df713377ddc0482071c3e6b64c37bd1e48f1f1 , < 2124279f1f8c32c1646ce98e75a1a39b23b7db76 (git)
Affected: 85df713377ddc0482071c3e6b64c37bd1e48f1f1 , < 2497ff38c530b1af0df5130ca9f5ab22c5e92f29 (git)
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Linux Linux Affected: 5.18
Unaffected: 0 , < 5.18 (semver)
Unaffected: 6.1.163 , ≤ 6.1.* (semver)
Unaffected: 6.6.124 , ≤ 6.6.* (semver)
Unaffected: 6.12.70 , ≤ 6.12.* (semver)
Unaffected: 6.18.10 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)
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                "drivers/hid/i2c-hid/i2c-hid-core.c"
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              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "lessThan": "f9c9ad89d845f88a1509e9d672f65d234425fde9",
                  "status": "affected",
                  "version": "85df713377ddc0482071c3e6b64c37bd1e48f1f1",
                  "versionType": "git"
                },
                {
                  "lessThan": "cff3f619fd1cb40cdd89971df9001f075613d219",
                  "status": "affected",
                  "version": "85df713377ddc0482071c3e6b64c37bd1e48f1f1",
                  "versionType": "git"
                },
                {
                  "lessThan": "786ec171788bdf9dda38789163f1b1fbb47f2d1e",
                  "status": "affected",
                  "version": "85df713377ddc0482071c3e6b64c37bd1e48f1f1",
                  "versionType": "git"
                },
                {
                  "lessThan": "2124279f1f8c32c1646ce98e75a1a39b23b7db76",
                  "status": "affected",
                  "version": "85df713377ddc0482071c3e6b64c37bd1e48f1f1",
                  "versionType": "git"
                },
                {
                  "lessThan": "2497ff38c530b1af0df5130ca9f5ab22c5e92f29",
                  "status": "affected",
                  "version": "85df713377ddc0482071c3e6b64c37bd1e48f1f1",
                  "versionType": "git"
                }
              ]
            },
            {
              "defaultStatus": "affected",
              "product": "Linux",
              "programFiles": [
                "drivers/hid/i2c-hid/i2c-hid-core.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "status": "affected",
                  "version": "5.18"
                },
                {
                  "lessThan": "5.18",
                  "status": "unaffected",
                  "version": "0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.1.*",
                  "status": "unaffected",
                  "version": "6.1.163",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.6.*",
                  "status": "unaffected",
                  "version": "6.6.124",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.12.*",
                  "status": "unaffected",
                  "version": "6.12.70",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.18.*",
                  "status": "unaffected",
                  "version": "6.18.10",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "6.19",
                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.1.163",
                      "versionStartIncluding": "5.18",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.6.124",
                      "versionStartIncluding": "5.18",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.12.70",
                      "versionStartIncluding": "5.18",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.18.10",
                      "versionStartIncluding": "5.18",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.19",
                      "versionStartIncluding": "5.18",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "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-\u003erawbuf`.\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-\u003ebufsize - sizeof(__le16)`.\n\nThe impact is low since access to hidraw devices requires root."
            }
          ],
          "metrics": [
            {
              "cvssV3_1": {
                "baseScore": 7.8,
                "baseSeverity": "HIGH",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "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."
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-08-05T12:20:29.229Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "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"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2026-23178",
        "datePublished": "2026-02-14T16:27:10.108Z",
        "dateReserved": "2026-01-13T15:37:45.984Z",
        "dateUpdated": "2026-10-19T18:25:34.295Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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