CVE-2025-68753 (GCVE-0-2025-68753)

Vulnerability from cvelistv5 – Published: 2026-01-05 09:32 – Updated: 2026-10-19 18:05
VLAI
Title
ALSA: firewire-motu: add bounds check in put_user loop for DSP events
Summary
In the Linux kernel, the following vulnerability has been resolved: ALSA: firewire-motu: add bounds check in put_user loop for DSP events In the DSP event handling code, a put_user() loop copies event data. When the user buffer size is not aligned to 4 bytes, it could overwrite beyond the buffer boundary. Fix by adding a bounds check before put_user().
Severity
7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-16 15:05 UTC
CWE
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7033 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 634ec0b2906efd46f6f57977e172aa3470aca432 , < ea2c921d9de6e32ca50cb817b9d57bb881be70de (git)
Affected: 634ec0b2906efd46f6f57977e172aa3470aca432 , < 6d4f17782ce4facf3197e79707df411ee3d7b30a (git)
Affected: 634ec0b2906efd46f6f57977e172aa3470aca432 , < 0d71b3c2ed742f1ccb3b0b7a61afb90c0251093f (git)
Affected: 634ec0b2906efd46f6f57977e172aa3470aca432 , < df692cf2b601a54b34edfdb9e683d67483aa8ce1 (git)
Affected: 634ec0b2906efd46f6f57977e172aa3470aca432 , < 8f9e51cf2a2a43d0cd72d3dc0b5ccea3f639c187 (git)
Affected: 634ec0b2906efd46f6f57977e172aa3470aca432 , < 298e753880b6ea99ac30df34959a7a03b0878eed (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.16
Unaffected: 0 , < 5.16 (semver)
Unaffected: 6.1.160 , ≤ 6.1.* (semver)
Unaffected: 6.6.120 , ≤ 6.6.* (semver)
Unaffected: 6.12.63 , ≤ 6.12.* (semver)
Unaffected: 6.17.13 , ≤ 6.17.* (semver)
Unaffected: 6.18.2 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)
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                  "versionType": "git"
                },
                {
                  "lessThan": "6d4f17782ce4facf3197e79707df411ee3d7b30a",
                  "status": "affected",
                  "version": "634ec0b2906efd46f6f57977e172aa3470aca432",
                  "versionType": "git"
                },
                {
                  "lessThan": "0d71b3c2ed742f1ccb3b0b7a61afb90c0251093f",
                  "status": "affected",
                  "version": "634ec0b2906efd46f6f57977e172aa3470aca432",
                  "versionType": "git"
                },
                {
                  "lessThan": "df692cf2b601a54b34edfdb9e683d67483aa8ce1",
                  "status": "affected",
                  "version": "634ec0b2906efd46f6f57977e172aa3470aca432",
                  "versionType": "git"
                },
                {
                  "lessThan": "8f9e51cf2a2a43d0cd72d3dc0b5ccea3f639c187",
                  "status": "affected",
                  "version": "634ec0b2906efd46f6f57977e172aa3470aca432",
                  "versionType": "git"
                },
                {
                  "lessThan": "298e753880b6ea99ac30df34959a7a03b0878eed",
                  "status": "affected",
                  "version": "634ec0b2906efd46f6f57977e172aa3470aca432",
                  "versionType": "git"
                }
              ]
            },
            {
              "defaultStatus": "affected",
              "product": "Linux",
              "programFiles": [
                "sound/firewire/motu/motu-hwdep.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "status": "affected",
                  "version": "5.16"
                },
                {
                  "lessThan": "5.16",
                  "status": "unaffected",
                  "version": "0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.1.*",
                  "status": "unaffected",
                  "version": "6.1.160",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.6.*",
                  "status": "unaffected",
                  "version": "6.6.120",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.12.*",
                  "status": "unaffected",
                  "version": "6.12.63",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.17.*",
                  "status": "unaffected",
                  "version": "6.17.13",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.18.*",
                  "status": "unaffected",
                  "version": "6.18.2",
                  "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": "6.1.160",
                      "versionStartIncluding": "5.16",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.6.120",
                      "versionStartIncluding": "5.16",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.12.63",
                      "versionStartIncluding": "5.16",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.17.13",
                      "versionStartIncluding": "5.16",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.18.2",
                      "versionStartIncluding": "5.16",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.19",
                      "versionStartIncluding": "5.16",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: firewire-motu: add bounds check in put_user loop for DSP events\n\nIn the DSP event handling code, a put_user() loop copies event data.\nWhen the user buffer size is not aligned to 4 bytes, it could overwrite\nbeyond the buffer boundary.\n\nFix by adding a bounds check before put_user()."
            }
          ],
          "metrics": [
            {
              "cvssV3_1": {
                "baseScore": 7.1,
                "baseSeverity": "HIGH",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H",
                "version": "3.1"
              },
              "scenarios": [
                {
                  "lang": "en",
                  "value": "AV:L - The flaw is reached through a local read() on the MOTU ALSA hwdep device; there is no network-receive path, although a supported FireWire unit must be attached and streaming.\nAC:L - The caller can deterministically trigger the overrun by supplying a count greater than the 8-byte header but not divisible by four while a DSP event is queued. No race or condition outside the attacker\u0027s control is required.\nPR:L - No capability or authentication check exists in the hwdep path; the attacker only needs ordinary user access to the sound device, commonly granted through an active-seat ACL or audio-group membership.\nUI:N - The attacker can open the hwdep and PCM devices, start streaming, and issue the malformed read without action by another user.\nS:U - The overwrite affects memory associated with the local consuming process and does not cross a VM, IOMMU, container, or other security-authority boundary.\nC:N - The vulnerable operation only writes an initialized DSP event to userspace; it performs no out-of-bounds read and provides no kernel-memory disclosure primitive.\nI:H - The loop can write a complete 32-bit, device-influenced event when only one to three bytes remain, corrupting adjacent userspace control data. Under the required higher-severity treatment for an out-of-bounds write, integrity impact is High.\nA:H - The adjacent-memory corruption can terminate the consuming process or a critical audio or control service and can be triggered repeatedly. Under the required higher-severity treatment for any crash, availability impact is High."
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-08-05T12:11:20.020Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/ea2c921d9de6e32ca50cb817b9d57bb881be70de"
            },
            {
              "url": "https://git.kernel.org/stable/c/6d4f17782ce4facf3197e79707df411ee3d7b30a"
            },
            {
              "url": "https://git.kernel.org/stable/c/0d71b3c2ed742f1ccb3b0b7a61afb90c0251093f"
            },
            {
              "url": "https://git.kernel.org/stable/c/df692cf2b601a54b34edfdb9e683d67483aa8ce1"
            },
            {
              "url": "https://git.kernel.org/stable/c/8f9e51cf2a2a43d0cd72d3dc0b5ccea3f639c187"
            },
            {
              "url": "https://git.kernel.org/stable/c/298e753880b6ea99ac30df34959a7a03b0878eed"
            }
          ],
          "title": "ALSA: firewire-motu: add bounds check in put_user loop for DSP events",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2025-68753",
        "datePublished": "2026-01-05T09:32:27.029Z",
        "dateReserved": "2025-12-24T10:30:51.033Z",
        "dateUpdated": "2026-10-19T18:05:06.414Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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