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

Vulnerability from cvelistv5 – Published: 2026-01-05 09:32 – Updated: 2026-08-05 12:11
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
Assigner
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)
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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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              "version": "6.18.2",
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          "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()."
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              "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."
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-68753",
    "datePublished": "2026-01-05T09:32:27.029Z",
    "dateReserved": "2025-12-24T10:30:51.033Z",
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    "redhat_vex": {
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      "current_release_date": "2026-07-30T10:02:09+00:00",
      "cve": "CVE-2025-68753",
      "id": "CVE-2025-68753",
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      "title": "kernel: ALSA: firewire-motu: add bounds check in put_user loop for DSP events",
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      "current_release_date": "2026-09-02T12:32:58Z",
      "cve": "CVE-2025-68753",
      "id": "CVE-2025-68753",
      "initial_release_date": "2026-01-06T00:24:13Z",
      "product_status:first_fixed": "2",
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      "product_status:known_not_affected": "354",
      "product_status:recommended": "390",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-68753",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-68753.json",
      "version": "39"
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  }
}



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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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