Vulnerability-Lookup

FKIE_CVE-2026-31624

Vulnerability from fkie_nvd - Published: 2026-04-24 15:16 - Updated: 2026-10-15 02:19

Severity

5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: HID: core: clamp report_size in s32ton() to avoid undefined shift s32ton() shifts by n-1 where n is the field's report_size, a value that comes directly from a HID device. The HID parser bounds report_size only to <= 256, so a broken HID device can supply a report descriptor with a wide field that triggers shift exponents up to 256 on a 32-bit type when an output report is built via hid_output_field() or hid_set_field(). Commit ec61b41918587 ("HID: core: fix shift-out-of-bounds in hid_report_raw_event") added the same n > 32 clamp to the function snto32(), but s32ton() was never given the same fix as I guess syzbot hadn't figured out how to fuzz a device the same way. Fix this up by just clamping the max value of n, just like snto32() does.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/0ab048dbdb1daacf17d52e9252297eb6e1298e49
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/58386f00af710922cafb0fb69211497beddfaa95	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/69c02ffde6ed4d535fa4e693a9e572729cad3d0d	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/76ad02854a30c394e0c076e6e6bed0a388573a94
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/8a8333237f1f5caab8d4c3d2c2e7578c4263a97f	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/932ae5309e53561197aa7d1606c7cf63af10e24f	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/97014719bb8fccb1ffcbbc299e84b1f11b114195	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/ea363a34086ddb4231adc581a7f36c39ec154bfc	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/eb415ddaf25e09ddb8fe5736a70c9de2e6462534
0b142b55-0307-4c5a-b3c9-f314f3fb7c5e	https://cert-portal.siemens.com/productcert/html/ssa-784472.html

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	2.6.20

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/hid/hid-core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "76ad02854a30c394e0c076e6e6bed0a388573a94",
              "status": "affected",
              "version": "dde5845a529ff753364a6d1aea61180946270bfa",
              "versionType": "git"
            },
            {
              "lessThan": "eb415ddaf25e09ddb8fe5736a70c9de2e6462534",
              "status": "affected",
              "version": "dde5845a529ff753364a6d1aea61180946270bfa",
              "versionType": "git"
            },
            {
              "lessThan": "0ab048dbdb1daacf17d52e9252297eb6e1298e49",
              "status": "affected",
              "version": "dde5845a529ff753364a6d1aea61180946270bfa",
              "versionType": "git"
            },
            {
              "lessThan": "932ae5309e53561197aa7d1606c7cf63af10e24f",
              "status": "affected",
              "version": "dde5845a529ff753364a6d1aea61180946270bfa",
              "versionType": "git"
            },
            {
              "lessThan": "58386f00af710922cafb0fb69211497beddfaa95",
              "status": "affected",
              "version": "dde5845a529ff753364a6d1aea61180946270bfa",
              "versionType": "git"
            },
            {
              "lessThan": "8a8333237f1f5caab8d4c3d2c2e7578c4263a97f",
              "status": "affected",
              "version": "dde5845a529ff753364a6d1aea61180946270bfa",
              "versionType": "git"
            },
            {
              "lessThan": "ea363a34086ddb4231adc581a7f36c39ec154bfc",
              "status": "affected",
              "version": "dde5845a529ff753364a6d1aea61180946270bfa",
              "versionType": "git"
            },
            {
              "lessThan": "97014719bb8fccb1ffcbbc299e84b1f11b114195",
              "status": "affected",
              "version": "dde5845a529ff753364a6d1aea61180946270bfa",
              "versionType": "git"
            },
            {
              "lessThan": "69c02ffde6ed4d535fa4e693a9e572729cad3d0d",
              "status": "affected",
              "version": "dde5845a529ff753364a6d1aea61180946270bfa",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/hid/hid-core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.20"
            },
            {
              "lessThan": "2.6.20",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.258",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.209",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.175",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.136",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.83",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.24",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.14",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "affectedData": [
        {
          "defaultStatus": "unknown",
          "product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem",
          "vendor": "Siemens",
          "versions": [
            {
              "lessThan": "*",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "098695E6-95CE-401B-AC16-CEBD793B4DF1",
              "versionEndExcluding": "6.6.136",
              "versionStartIncluding": "2.6.20.1",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "7F0AE5B5-23AC-4DCC-B37A-51CA1DAE7BA8",
              "versionEndExcluding": "6.12.83",
              "versionStartIncluding": "6.7",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "8126B8B8-6D0B-4443-86C1-672AEE893555",
              "versionEndExcluding": "6.18.24",
              "versionStartIncluding": "6.13",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "D6A8A074-BBF4-4803-ABED-519A839435BB",
              "versionEndExcluding": "6.19.14",
              "versionStartIncluding": "6.19",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "9B5888AB-7403-4335-89E4-21CC0B48366A",
              "versionEndExcluding": "7.0.1",
              "versionStartIncluding": "7.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:2.6.20:-:*:*:*:*:*:*",
              "matchCriteriaId": "5AE1560A-DECA-4BC6-87F6-F3F9ED544840",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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\u0027s 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\u0027t 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",
  "lastModified": "2026-10-15T02:19:13.317",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2026-04-24T15:16:41.697",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0ab048dbdb1daacf17d52e9252297eb6e1298e49"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/58386f00af710922cafb0fb69211497beddfaa95"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/69c02ffde6ed4d535fa4e693a9e572729cad3d0d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/76ad02854a30c394e0c076e6e6bed0a388573a94"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/8a8333237f1f5caab8d4c3d2c2e7578c4263a97f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/932ae5309e53561197aa7d1606c7cf63af10e24f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/97014719bb8fccb1ffcbbc299e84b1f11b114195"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/ea363a34086ddb4231adc581a7f36c39ec154bfc"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/eb415ddaf25e09ddb8fe5736a70c9de2e6462534"
    },
    {
      "source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
      "url": "https://cert-portal.siemens.com/productcert/html/ssa-784472.html"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2026-31624 (GCVE-0-2026-31624)

Vulnerability from cvelistv5 – Published: 2026-04-24 14:42 – Updated: 2026-10-15 01:17

Title

HID: core: clamp report_size in s32ton() to avoid undefined shift

Summary

Severity

No CVSS data available.

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 7056 records in the last 180 days details

References

10 references

URL	Tags
https://git.kernel.org/stable/c/76ad02854a30c394e…
https://git.kernel.org/stable/c/eb415ddaf25e09ddb…
https://git.kernel.org/stable/c/0ab048dbdb1daacf1…
https://git.kernel.org/stable/c/932ae5309e5356119…
https://git.kernel.org/stable/c/58386f00af710922c…
https://git.kernel.org/stable/c/8a8333237f1f5caab…
https://git.kernel.org/stable/c/ea363a34086ddb423…
https://git.kernel.org/stable/c/97014719bb8fccb1f…
https://git.kernel.org/stable/c/69c02ffde6ed4d535…
https://cert-portal.siemens.com/productcert/html/…

Impacted products

3 products

Vendor	Product	Version
Linux	Linux	Affected: dde5845a529ff753364a6d1aea61180946270bfa , < 76ad02854a30c394e0c076e6e6bed0a388573a94 (git) Affected: dde5845a529ff753364a6d1aea61180946270bfa , < eb415ddaf25e09ddb8fe5736a70c9de2e6462534 (git) Affected: dde5845a529ff753364a6d1aea61180946270bfa , < 0ab048dbdb1daacf17d52e9252297eb6e1298e49 (git) Affected: dde5845a529ff753364a6d1aea61180946270bfa , < 932ae5309e53561197aa7d1606c7cf63af10e24f (git) Affected: dde5845a529ff753364a6d1aea61180946270bfa , < 58386f00af710922cafb0fb69211497beddfaa95 (git) Affected: dde5845a529ff753364a6d1aea61180946270bfa , < 8a8333237f1f5caab8d4c3d2c2e7578c4263a97f (git) Affected: dde5845a529ff753364a6d1aea61180946270bfa , < ea363a34086ddb4231adc581a7f36c39ec154bfc (git) Affected: dde5845a529ff753364a6d1aea61180946270bfa , < 97014719bb8fccb1ffcbbc299e84b1f11b114195 (git) Affected: dde5845a529ff753364a6d1aea61180946270bfa , < 69c02ffde6ed4d535fa4e693a9e572729cad3d0d (git)
Linux	Linux	Affected: 2.6.20 Unaffected: 0 , < 2.6.20 (semver) Unaffected: 5.10.258 , ≤ 5.10.* (semver) Unaffected: 5.15.209 , ≤ 5.15.* (semver) Unaffected: 6.1.175 , ≤ 6.1.* (semver) Unaffected: 6.6.136 , ≤ 6.6.* (semver) Unaffected: 6.12.83 , ≤ 6.12.* (semver) Unaffected: 6.18.24 , ≤ 6.18.* (semver) Unaffected: 6.19.14 , ≤ 6.19.* (semver) Unaffected: 7.0.1 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)
Siemens	SIMATIC S7-1500 TM MFP - GNU/Linux subsystem	Affected: 0 , < * (custom)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "affected": [
          {
            "defaultStatus": "unknown",
            "product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem",
            "vendor": "Siemens",
            "versions": [
              {
                "lessThan": "*",
                "status": "affected",
                "version": "0",
                "versionType": "custom"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-15T01:17:16.412Z",
          "orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
          "shortName": "siemens-SADP"
        },
        "references": [
          {
            "url": "https://cert-portal.siemens.com/productcert/html/ssa-784472.html"
          }
        ],
        "x_adpType": "supplier"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/hid/hid-core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "76ad02854a30c394e0c076e6e6bed0a388573a94",
              "status": "affected",
              "version": "dde5845a529ff753364a6d1aea61180946270bfa",
              "versionType": "git"
            },
            {
              "lessThan": "eb415ddaf25e09ddb8fe5736a70c9de2e6462534",
              "status": "affected",
              "version": "dde5845a529ff753364a6d1aea61180946270bfa",
              "versionType": "git"
            },
            {
              "lessThan": "0ab048dbdb1daacf17d52e9252297eb6e1298e49",
              "status": "affected",
              "version": "dde5845a529ff753364a6d1aea61180946270bfa",
              "versionType": "git"
            },
            {
              "lessThan": "932ae5309e53561197aa7d1606c7cf63af10e24f",
              "status": "affected",
              "version": "dde5845a529ff753364a6d1aea61180946270bfa",
              "versionType": "git"
            },
            {
              "lessThan": "58386f00af710922cafb0fb69211497beddfaa95",
              "status": "affected",
              "version": "dde5845a529ff753364a6d1aea61180946270bfa",
              "versionType": "git"
            },
            {
              "lessThan": "8a8333237f1f5caab8d4c3d2c2e7578c4263a97f",
              "status": "affected",
              "version": "dde5845a529ff753364a6d1aea61180946270bfa",
              "versionType": "git"
            },
            {
              "lessThan": "ea363a34086ddb4231adc581a7f36c39ec154bfc",
              "status": "affected",
              "version": "dde5845a529ff753364a6d1aea61180946270bfa",
              "versionType": "git"
            },
            {
              "lessThan": "97014719bb8fccb1ffcbbc299e84b1f11b114195",
              "status": "affected",
              "version": "dde5845a529ff753364a6d1aea61180946270bfa",
              "versionType": "git"
            },
            {
              "lessThan": "69c02ffde6ed4d535fa4e693a9e572729cad3d0d",
              "status": "affected",
              "version": "dde5845a529ff753364a6d1aea61180946270bfa",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/hid/hid-core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.20"
            },
            {
              "lessThan": "2.6.20",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.258",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.209",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.175",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.136",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.83",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.24",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.14",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.258",
                  "versionStartIncluding": "2.6.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.209",
                  "versionStartIncluding": "2.6.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.175",
                  "versionStartIncluding": "2.6.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.136",
                  "versionStartIncluding": "2.6.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.83",
                  "versionStartIncluding": "2.6.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.24",
                  "versionStartIncluding": "2.6.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.14",
                  "versionStartIncluding": "2.6.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.1",
                  "versionStartIncluding": "2.6.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "2.6.20",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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\u0027s 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\u0027t 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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-14T17:43:12.552Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/76ad02854a30c394e0c076e6e6bed0a388573a94"
        },
        {
          "url": "https://git.kernel.org/stable/c/eb415ddaf25e09ddb8fe5736a70c9de2e6462534"
        },
        {
          "url": "https://git.kernel.org/stable/c/0ab048dbdb1daacf17d52e9252297eb6e1298e49"
        },
        {
          "url": "https://git.kernel.org/stable/c/932ae5309e53561197aa7d1606c7cf63af10e24f"
        },
        {
          "url": "https://git.kernel.org/stable/c/58386f00af710922cafb0fb69211497beddfaa95"
        },
        {
          "url": "https://git.kernel.org/stable/c/8a8333237f1f5caab8d4c3d2c2e7578c4263a97f"
        },
        {
          "url": "https://git.kernel.org/stable/c/ea363a34086ddb4231adc581a7f36c39ec154bfc"
        },
        {
          "url": "https://git.kernel.org/stable/c/97014719bb8fccb1ffcbbc299e84b1f11b114195"
        },
        {
          "url": "https://git.kernel.org/stable/c/69c02ffde6ed4d535fa4e693a9e572729cad3d0d"
        }
      ],
      "title": "HID: core: clamp report_size in s32ton() to avoid undefined shift",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-31624",
    "datePublished": "2026-04-24T14:42:41.655Z",
    "dateReserved": "2026-03-09T15:48:24.124Z",
    "dateUpdated": "2026-10-15T01:17:16.412Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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