{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "dde5845a529ff753364a6d1aea61180946270bfa"
            },
            {
              "fixed": "76ad02854a30c394e0c076e6e6bed0a388573a94"
            },
            {
              "fixed": "eb415ddaf25e09ddb8fe5736a70c9de2e6462534"
            },
            {
              "fixed": "0ab048dbdb1daacf17d52e9252297eb6e1298e49"
            },
            {
              "fixed": "932ae5309e53561197aa7d1606c7cf63af10e24f"
            },
            {
              "fixed": "58386f00af710922cafb0fb69211497beddfaa95"
            },
            {
              "fixed": "8a8333237f1f5caab8d4c3d2c2e7578c4263a97f"
            },
            {
              "fixed": "ea363a34086ddb4231adc581a7f36c39ec154bfc"
            },
            {
              "fixed": "97014719bb8fccb1ffcbbc299e84b1f11b114195"
            },
            {
              "fixed": "69c02ffde6ed4d535fa4e693a9e572729cad3d0d"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.20"
            },
            {
              "fixed": "5.10.258"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.209"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.175"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.136"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.83"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.24"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.14"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.20.0"
            },
            {
              "fixed": "7.0.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31624.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: core: clamp report_size in s32ton() to avoid undefined shift\n\ns32ton() shifts by n-1 where n is the field's report_size, a value that\ncomes directly from a HID device.  The HID parser bounds report_size\nonly to \u003c= 256, so a broken HID device can supply a report descriptor\nwith a wide field that triggers shift exponents up to 256 on a 32-bit\ntype when an output report is built via hid_output_field() or\nhid_set_field().\n\nCommit ec61b41918587 (\"HID: core: fix shift-out-of-bounds in\nhid_report_raw_event\") added the same n \u003e 32 clamp to the function\nsnto32(), but s32ton() was never given the same fix as I guess syzbot\nhadn't figured out how to fuzz a device the same way.\n\nFix this up by just clamping the max value of n, just like snto32()\ndoes.",
  "id": "CVE-2026-31624",
  "modified": "2026-07-08T05:39:02.130570466Z",
  "published": "2026-04-24T14:42:41.655Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0ab048dbdb1daacf17d52e9252297eb6e1298e49"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/58386f00af710922cafb0fb69211497beddfaa95"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/69c02ffde6ed4d535fa4e693a9e572729cad3d0d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/76ad02854a30c394e0c076e6e6bed0a388573a94"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8a8333237f1f5caab8d4c3d2c2e7578c4263a97f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/932ae5309e53561197aa7d1606c7cf63af10e24f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/97014719bb8fccb1ffcbbc299e84b1f11b114195"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ea363a34086ddb4231adc581a7f36c39ec154bfc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/eb415ddaf25e09ddb8fe5736a70c9de2e6462534"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31624.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31624"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "summary": "HID: core: clamp report_size in s32ton() to avoid undefined shift"
}