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CVE-2026-64483 (GCVE-0-2026-64483)

Vulnerability from cvelistv5 – Published: 2026-07-25 08:51 – Updated: 2026-08-17 04:56
VLAI
Title
ALSA: firewire: isight: bound the sample count to the packet payload
Summary
In the Linux kernel, the following vulnerability has been resolved: ALSA: firewire: isight: bound the sample count to the packet payload isight_packet() takes the frame count from the device iso packet and checks it only against the device claimed iso length. count = be32_to_cpu(payload->sample_count); if (likely(count <= (length - 16) / 4)) isight_samples(isight, payload->samples, count); length is the iso header data_length. It can be up to 0xffff. So the gate allows a count up to about 16379. isight_samples() then copies count frames out of payload->samples into the PCM DMA buffer. payload->samples holds only 2 * MAX_FRAMES_PER_PACKET values. The device multiplexes two samples per frame. A count past MAX_FRAMES_PER_PACKET reads past the payload. A count past the buffer size writes past runtime->dma_area. The smallest PCM buffer is larger than MAX_FRAMES_PER_PACKET. Bounding the count to MAX_FRAMES_PER_PACKET keeps both the read and the write in range. A malicious or faulty Apple iSight on the FireWire bus reaches this during a normal capture. Add the MAX_FRAMES_PER_PACKET bound to the gate.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 3a691b28a0ca3cf4d9010c6158318159e0275d2c , < 24423e0a9251d348c3f1fb0bb0e61b879e1e976c (git)
Affected: 3a691b28a0ca3cf4d9010c6158318159e0275d2c , < ebbffacda6733dcbcef601b5b523460f8d8b671e (git)
Affected: 3a691b28a0ca3cf4d9010c6158318159e0275d2c , < 57e4d9043afc1eaddee8f50d11def6e65415d273 (git)
Affected: 3a691b28a0ca3cf4d9010c6158318159e0275d2c , < 3ed2fa1ed8cc65f910b8bbc0be3cc366b30f8478 (git)
Affected: 3a691b28a0ca3cf4d9010c6158318159e0275d2c , < 31da82b9676c6b112e7c72c7529e6812b919742a (git)
Affected: 3a691b28a0ca3cf4d9010c6158318159e0275d2c , < 8e48a29813df8dd71503800b7acf69c12c035045 (git)
Affected: 3a691b28a0ca3cf4d9010c6158318159e0275d2c , < 31a01b70bb90e3ef3147f308e2ea899e1d2485ca (git)
Affected: 3a691b28a0ca3cf4d9010c6158318159e0275d2c , < 29b9667982e4df2ed7744f86b1144f8bb58eb698 (git)
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Linux Linux Affected: 3.0
Unaffected: 0 , < 3.0 (semver)
Unaffected: 5.10.261 , ≤ 5.10.* (semver)
Unaffected: 5.15.212 , ≤ 5.15.* (semver)
Unaffected: 6.1.178 , ≤ 6.1.* (semver)
Unaffected: 6.6.145 , ≤ 6.6.* (semver)
Unaffected: 6.12.96 , ≤ 6.12.* (semver)
Unaffected: 6.18.39 , ≤ 6.18.* (semver)
Unaffected: 7.1.4 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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          }
        ],
        "id": "CVE-2026-64483",
        "lastModified": "2026-08-17T05:17:54.097",
        "metrics": {},
        "published": "2026-07-25T10:17:33.957",
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        "vulnStatus": "Received"
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      "current_release_date": "2026-09-14T19:49:13+00:00",
      "cve": "CVE-2026-64483",
      "id": "CVE-2026-64483",
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      "product_status:known_affected": "76",
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      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: ALSA: firewire: isight: bound the sample count to the packet payload",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64483.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-18T00:39:30Z",
      "cve": "CVE-2026-64483",
      "id": "CVE-2026-64483",
      "initial_release_date": "2026-07-25T15:58:29Z",
      "product_status:known_affected": "675",
      "product_status:known_not_affected": "58",
      "product_status:recommended": "111",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-64483",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-64483.json",
      "version": "12"
    }
  }
}



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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

Author Source Type Date Other

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.