github - ghsa-fr7f-qh29-24jq

ghsa-fr7f-qh29-24jq

Vulnerability from github

Published

2025-08-19 18:31

Modified

2025-09-09 18:31

Details

In the Linux kernel, the following vulnerability has been resolved:

HID: core: Harden s32ton() against conversion to 0 bits

Testing by the syzbot fuzzer showed that the HID core gets a shift-out-of-bounds exception when it tries to convert a 32-bit quantity to a 0-bit quantity. Ideally this should never occur, but there are buggy devices and some might have a report field with size set to zero; we shouldn't reject the report or the device just because of that.

Instead, harden the s32ton() routine so that it returns a reasonable result instead of crashing when it is called with the number of bits set to 0 -- the same as what snto32() does.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-38556"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-08-19T17:15:31Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: core: Harden s32ton() against conversion to 0 bits\n\nTesting by the syzbot fuzzer showed that the HID core gets a\nshift-out-of-bounds exception when it tries to convert a 32-bit\nquantity to a 0-bit quantity.  Ideally this should never occur, but\nthere are buggy devices and some might have a report field with size\nset to zero; we shouldn\u0027t reject the report or the device just because\nof that.\n\nInstead, harden the s32ton() routine so that it returns a reasonable\nresult instead of crashing when it is called with the number of bits\nset to 0 -- the same as what snto32() does.",
  "id": "GHSA-fr7f-qh29-24jq",
  "modified": "2025-09-09T18:31:11Z",
  "published": "2025-08-19T18:31:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-38556"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/865ad8469fa24de1559f247d9426ab01e5ce3a56"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8b4a94b1510f6a46ec48494b52ee8f67eb4fc836"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a6b87bfc2ab5bccb7ad953693c85d9062aef3fdd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d3b504146c111548ab60b6ef7aad00bfb1db05a2"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2025-38556 (GCVE-0-2025-38556)

Vulnerability from cvelistv5

Published

2025-08-19 17:02

Modified

2025-09-09 17:06

Severity ?

Summary

In the Linux kernel, the following vulnerability has been resolved: HID: core: Harden s32ton() against conversion to 0 bits Testing by the syzbot fuzzer showed that the HID core gets a shift-out-of-bounds exception when it tries to convert a 32-bit quantity to a 0-bit quantity. Ideally this should never occur, but there are buggy devices and some might have a report field with size set to zero; we shouldn't reject the report or the device just because of that. Instead, harden the s32ton() routine so that it returns a reasonable result instead of crashing when it is called with the number of bits set to 0 -- the same as what snto32() does.

References

▼	URL	Tags
	https://git.kernel.org/stable/c/d3b504146c111548ab60b6ef7aad00bfb1db05a2
	https://git.kernel.org/stable/c/8b4a94b1510f6a46ec48494b52ee8f67eb4fc836
	https://git.kernel.org/stable/c/865ad8469fa24de1559f247d9426ab01e5ce3a56
	https://git.kernel.org/stable/c/a6b87bfc2ab5bccb7ad953693c85d9062aef3fdd

Impacted products

Vendor

Product

Version

▼

Linux

Version: dde5845a529ff753364a6d1aea61180946270bfa
Version: dde5845a529ff753364a6d1aea61180946270bfa
Version: dde5845a529ff753364a6d1aea61180946270bfa
Version: dde5845a529ff753364a6d1aea61180946270bfa

Linux

Version: 2.6.20

Show details on NVD website

JSON

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{
  "containers": {
    "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": "d3b504146c111548ab60b6ef7aad00bfb1db05a2",
              "status": "affected",
              "version": "dde5845a529ff753364a6d1aea61180946270bfa",
              "versionType": "git"
            },
            {
              "lessThan": "8b4a94b1510f6a46ec48494b52ee8f67eb4fc836",
              "status": "affected",
              "version": "dde5845a529ff753364a6d1aea61180946270bfa",
              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "dde5845a529ff753364a6d1aea61180946270bfa",
              "versionType": "git"
            },
            {
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              "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": "6.12.*",
              "status": "unaffected",
              "version": "6.12.46",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.15.*",
              "status": "unaffected",
              "version": "6.15.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.16.*",
              "status": "unaffected",
              "version": "6.16.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.17-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.46",
                  "versionStartIncluding": "2.6.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.15.10",
                  "versionStartIncluding": "2.6.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.16.1",
                  "versionStartIncluding": "2.6.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.17-rc1",
                  "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: Harden s32ton() against conversion to 0 bits\n\nTesting by the syzbot fuzzer showed that the HID core gets a\nshift-out-of-bounds exception when it tries to convert a 32-bit\nquantity to a 0-bit quantity.  Ideally this should never occur, but\nthere are buggy devices and some might have a report field with size\nset to zero; we shouldn\u0027t reject the report or the device just because\nof that.\n\nInstead, harden the s32ton() routine so that it returns a reasonable\nresult instead of crashing when it is called with the number of bits\nset to 0 -- the same as what snto32() does."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-09-09T17:06:16.166Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/d3b504146c111548ab60b6ef7aad00bfb1db05a2"
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        {
          "url": "https://git.kernel.org/stable/c/a6b87bfc2ab5bccb7ad953693c85d9062aef3fdd"
        }
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      "title": "HID: core: Harden s32ton() against conversion to 0 bits",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38556",
    "datePublished": "2025-08-19T17:02:34.929Z",
    "dateReserved": "2025-04-16T04:51:24.025Z",
    "dateUpdated": "2025-09-09T17:06:16.166Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

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