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CVE-2025-68347 (GCVE-0-2025-68347)

Vulnerability from cvelistv5 – Published: 2025-12-24 10:32 – Updated: 2026-08-05 12:10
VLAI
Title
ALSA: firewire-motu: fix buffer overflow in hwdep read for DSP events
Summary
In the Linux kernel, the following vulnerability has been resolved: ALSA: firewire-motu: fix buffer overflow in hwdep read for DSP events The DSP event handling code in hwdep_read() could write more bytes to the user buffer than requested, when a user provides a buffer smaller than the event header size (8 bytes). Fix by using min_t() to clamp the copy size, This ensures we never copy more than the user requested.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 634ec0b2906efd46f6f57977e172aa3470aca432 , < 16620f0617400746984362c3d6ac547eeae1d35f (git)
Affected: 634ec0b2906efd46f6f57977e172aa3470aca432 , < ddd32ec66bc4eb6969fe835e4cc1c0706c6348fe (git)
Affected: 634ec0b2906efd46f6f57977e172aa3470aca432 , < 6275fd726d53a8ec724f20201cf3bd862711e17b (git)
Affected: 634ec0b2906efd46f6f57977e172aa3470aca432 , < 161291bac551821bba98eb4ea84c82338578d1b0 (git)
Affected: 634ec0b2906efd46f6f57977e172aa3470aca432 , < cdda0d06f8650e33255f79839f188bbece44117c (git)
Affected: 634ec0b2906efd46f6f57977e172aa3470aca432 , < 210d77cca3d0494ed30a5c628b20c1d95fa04fb1 (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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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: firewire-motu: fix buffer overflow in hwdep read for DSP events\n\nThe DSP event handling code in hwdep_read() could write more bytes to\nthe user buffer than requested, when a user provides a buffer smaller\nthan the event header size (8 bytes).\n\nFix by using min_t() to clamp the copy size, This ensures we never copy\nmore than the user requested."
        }
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            "version": "3.1"
          },
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              "value": "AV:L - Exploitation reaches the vulnerable callback through read() on the local ALSA hwdep device; the connected MOTU interface is a deployment prerequisite rather than the attack channel.\nAC:L - A device-authorized attacker can start streaming, induce or await a DSP parameter event, and deterministically request fewer than eight bytes. No race or condition outside the attacker\u2019s influence is required.\nPR:L - The path has no capability or namespace check, but requires ordinary access to the ALSA device node, commonly granted to an active unprivileged user or audio-group member.\nUI:N - No human victim action is required once a DSP event is queued; the attacker or an automatically operating consumer can trigger the faulty read.\nS:U - The corruption occurs within the host\u2019s kernel/userspace security authority and does not cross a VM, IOMMU, or comparable isolation boundary.\nC:H - The direct header contains no secret, but the out-of-bounds write can corrupt adjacent allocator or control data in a privileged consumer. Under the required higher-severity assumption, resulting control-flow compromise could expose all data accessible to that process.\nI:H - The kernel writes an eight-byte header despite a request for as few as zero bytes, allowing up to seven bytes of adjacent userspace memory corruption. Such an out-of-bounds write can corrupt pointers or allocator metadata and potentially enable control-flow hijacking.\nA:H - The overwrite can crash the consuming process, and the still-queued or repeatedly induced DSP event permits recurring denial of a critical audio or control service."
            }
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    "dateReserved": "2025-12-16T14:48:05.299Z",
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      "current_release_date": "2026-07-30T08:37:02+00:00",
      "cve": "CVE-2025-68347",
      "id": "CVE-2025-68347",
      "initial_release_date": "2025-12-24T00:00:00+00:00",
      "product_status:fixed": "150",
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      "source": "Red Hat CSAF VEX",
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      "title": "kernel: ALSA: firewire-motu: fix buffer overflow in hwdep read for DSP events",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-68347.json",
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  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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.


Related by attack behaviour

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.