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

Vulnerability from cvelistv5 – Published: 2025-08-19 17:02 – Updated: 2026-01-19 12:18
VLAI?
Title
HID: core: Harden s32ton() against conversion to 0 bits
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: dde5845a529ff753364a6d1aea61180946270bfa , < 6cdf6c708717c5c6897d0800a1793e83757c7491 (git)
Affected: dde5845a529ff753364a6d1aea61180946270bfa , < eeeaba737919bdce9885e2a00ac2912f61a3684d (git)
Affected: dde5845a529ff753364a6d1aea61180946270bfa , < 3c86548a20d7bc2861aa4de044991a327bebad1a (git)
Affected: dde5845a529ff753364a6d1aea61180946270bfa , < 810189546cb6c8f36443ed091d91f1f5d2fc2ec7 (git)
Affected: dde5845a529ff753364a6d1aea61180946270bfa , < d3b504146c111548ab60b6ef7aad00bfb1db05a2 (git)
Affected: dde5845a529ff753364a6d1aea61180946270bfa , < 8b4a94b1510f6a46ec48494b52ee8f67eb4fc836 (git)
Affected: dde5845a529ff753364a6d1aea61180946270bfa , < 865ad8469fa24de1559f247d9426ab01e5ce3a56 (git)
Affected: dde5845a529ff753364a6d1aea61180946270bfa , < a6b87bfc2ab5bccb7ad953693c85d9062aef3fdd (git)
Create a notification for this product.
    Linux Linux Affected: 2.6.20
Unaffected: 0 , < 2.6.20 (semver)
Unaffected: 5.10.248 , ≤ 5.10.* (semver)
Unaffected: 5.15.198 , ≤ 5.15.* (semver)
Unaffected: 6.1.159 , ≤ 6.1.* (semver)
Unaffected: 6.6.119 , ≤ 6.6.* (semver)
Unaffected: 6.12.46 , ≤ 6.12.* (semver)
Unaffected: 6.15.10 , ≤ 6.15.* (semver)
Unaffected: 6.16.1 , ≤ 6.16.* (semver)
Unaffected: 6.17 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "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": "6cdf6c708717c5c6897d0800a1793e83757c7491",
              "status": "affected",
              "version": "dde5845a529ff753364a6d1aea61180946270bfa",
              "versionType": "git"
            },
            {
              "lessThan": "eeeaba737919bdce9885e2a00ac2912f61a3684d",
              "status": "affected",
              "version": "dde5845a529ff753364a6d1aea61180946270bfa",
              "versionType": "git"
            },
            {
              "lessThan": "3c86548a20d7bc2861aa4de044991a327bebad1a",
              "status": "affected",
              "version": "dde5845a529ff753364a6d1aea61180946270bfa",
              "versionType": "git"
            },
            {
              "lessThan": "810189546cb6c8f36443ed091d91f1f5d2fc2ec7",
              "status": "affected",
              "version": "dde5845a529ff753364a6d1aea61180946270bfa",
              "versionType": "git"
            },
            {
              "lessThan": "d3b504146c111548ab60b6ef7aad00bfb1db05a2",
              "status": "affected",
              "version": "dde5845a529ff753364a6d1aea61180946270bfa",
              "versionType": "git"
            },
            {
              "lessThan": "8b4a94b1510f6a46ec48494b52ee8f67eb4fc836",
              "status": "affected",
              "version": "dde5845a529ff753364a6d1aea61180946270bfa",
              "versionType": "git"
            },
            {
              "lessThan": "865ad8469fa24de1559f247d9426ab01e5ce3a56",
              "status": "affected",
              "version": "dde5845a529ff753364a6d1aea61180946270bfa",
              "versionType": "git"
            },
            {
              "lessThan": "a6b87bfc2ab5bccb7ad953693c85d9062aef3fdd",
              "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": "5.10.248",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.198",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.159",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.119",
              "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",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.248",
                  "versionStartIncluding": "2.6.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.198",
                  "versionStartIncluding": "2.6.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.159",
                  "versionStartIncluding": "2.6.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.119",
                  "versionStartIncluding": "2.6.20",
                  "vulnerable": true
                },
                {
                  "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",
                  "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": "2026-01-19T12:18:03.142Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/6cdf6c708717c5c6897d0800a1793e83757c7491"
        },
        {
          "url": "https://git.kernel.org/stable/c/eeeaba737919bdce9885e2a00ac2912f61a3684d"
        },
        {
          "url": "https://git.kernel.org/stable/c/3c86548a20d7bc2861aa4de044991a327bebad1a"
        },
        {
          "url": "https://git.kernel.org/stable/c/810189546cb6c8f36443ed091d91f1f5d2fc2ec7"
        },
        {
          "url": "https://git.kernel.org/stable/c/d3b504146c111548ab60b6ef7aad00bfb1db05a2"
        },
        {
          "url": "https://git.kernel.org/stable/c/8b4a94b1510f6a46ec48494b52ee8f67eb4fc836"
        },
        {
          "url": "https://git.kernel.org/stable/c/865ad8469fa24de1559f247d9426ab01e5ce3a56"
        },
        {
          "url": "https://git.kernel.org/stable/c/a6b87bfc2ab5bccb7ad953693c85d9062aef3fdd"
        }
      ],
      "title": "HID: core: Harden s32ton() against conversion to 0 bits",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38556",
    "datePublished": "2025-08-19T17:02:34.929Z",
    "dateReserved": "2025-04-16T04:51:24.025Z",
    "dateUpdated": "2026-01-19T12:18:03.142Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • 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.



Detection rules are retrieved from Rulezet.