Vulnerability-Lookup

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

Vulnerability from cvelistv5 – Published: 2026-07-25 08:51 – Updated: 2026-07-25 08:51

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

Linux

References

8 references

URL	Tags
https://git.kernel.org/stable/c/24423e0a9251d348c…
https://git.kernel.org/stable/c/ebbffacda6733dcbc…
https://git.kernel.org/stable/c/57e4d9043afc1eadd…
https://git.kernel.org/stable/c/3ed2fa1ed8cc65f91…
https://git.kernel.org/stable/c/31da82b9676c6b112…
https://git.kernel.org/stable/c/8e48a29813df8dd71…
https://git.kernel.org/stable/c/31a01b70bb90e3ef3…
https://git.kernel.org/stable/c/29b9667982e4df2ed…

Impacted products

2 products

Vendor	Product	Version
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)
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-rc1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: firewire: isight: bound the sample count to the packet payload\n\nisight_packet() takes the frame count from the device iso packet and\nchecks it only against the device claimed iso length.\n\n\tcount = be32_to_cpu(payload-\u003esample_count);\n\tif (likely(count \u003c= (length - 16) / 4))\n\t\tisight_samples(isight, payload-\u003esamples, count);\n\nlength is the iso header data_length. It can be up to 0xffff. So the\ngate allows a count up to about 16379. isight_samples() then copies\ncount frames out of payload-\u003esamples into the PCM DMA buffer.\n\npayload-\u003esamples holds only 2 * MAX_FRAMES_PER_PACKET values. The\ndevice multiplexes two samples per frame. A count past\nMAX_FRAMES_PER_PACKET reads past the payload. A count past the buffer\nsize writes past runtime-\u003edma_area. The smallest PCM buffer is larger\nthan MAX_FRAMES_PER_PACKET. Bounding the count to MAX_FRAMES_PER_PACKET\nkeeps both the read and the write in range.\n\nA malicious or faulty Apple iSight on the FireWire bus reaches this\nduring a normal capture.\n\nAdd the MAX_FRAMES_PER_PACKET bound to the gate."
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So the\\ngate allows a count up to about 16379. isight_samples() then copies\\ncount frames out of payload-\u003esamples into the PCM DMA buffer.\\n\\npayload-\u003esamples holds only 2 * MAX_FRAMES_PER_PACKET values. The\\ndevice multiplexes two samples per frame. A count past\\nMAX_FRAMES_PER_PACKET reads past the payload. A count past the buffer\\nsize writes past runtime-\u003edma_area. The smallest PCM buffer is larger\\nthan MAX_FRAMES_PER_PACKET. Bounding the count to MAX_FRAMES_PER_PACKET\\nkeeps both the read and the write in range.\\n\\nA malicious or faulty Apple iSight on the FireWire bus reaches this\\nduring a normal capture.\\n\\nAdd the MAX_FRAMES_PER_PACKET bound to the gate.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"sound/firewire/isight.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"3a691b28a0ca3cf4d9010c6158318159e0275d2c\",\"lessThan\":\"24423e0a9251d348c3f1fb0bb0e61b879e1e976c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3a691b28a0ca3cf4d9010c6158318159e0275d2c\",\"lessThan\":\"ebbffacda6733dcbcef601b5b523460f8d8b671e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3a691b28a0ca3cf4d9010c6158318159e0275d2c\",\"lessThan\":\"57e4d9043afc1eaddee8f50d11def6e65415d273\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3a691b28a0ca3cf4d9010c6158318159e0275d2c\",\"lessThan\":\"3ed2fa1ed8cc65f910b8bbc0be3cc366b30f8478\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3a691b28a0ca3cf4d9010c6158318159e0275d2c\",\"lessThan\":\"31da82b9676c6b112e7c72c7529e6812b919742a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3a691b28a0ca3cf4d9010c6158318159e0275d2c\",\"lessThan\":\"8e48a29813df8dd71503800b7acf69c12c035045\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3a691b28a0ca3cf4d9010c6158318159e0275d2c\",\"lessThan\":\"31a01b70bb90e3ef3147f308e2ea899e1d2485ca\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"3a691b28a0ca3cf4d9010c6158318159e0275d2c\",\"lessThan\":\"29b9667982e4df2ed7744f86b1144f8bb58eb698\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"sound/firewire/isight.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"3.0\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"3.0\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.261\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.212\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.178\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.145\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.96\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.39\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.4\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2-rc1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/24423e0a9251d348c3f1fb0bb0e61b879e1e976c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/29b9667982e4df2ed7744f86b1144f8bb58eb698\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/31a01b70bb90e3ef3147f308e2ea899e1d2485ca\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/31da82b9676c6b112e7c72c7529e6812b919742a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3ed2fa1ed8cc65f910b8bbc0be3cc366b30f8478\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/57e4d9043afc1eaddee8f50d11def6e65415d273\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8e48a29813df8dd71503800b7acf69c12c035045\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ebbffacda6733dcbcef601b5b523460f8d8b671e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "suse_vex": {
      "aggregate_severity": "not set",
      "current_release_date": "2026-07-25T15:58:29Z",
      "cve": "CVE-2026-64483",
      "id": "CVE-2026-64483",
      "initial_release_date": "2026-07-25T15:58:29Z",
      "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": "2"
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}

GHSA-J22X-MH97-FRW2

Vulnerability from github – Published: 2026-07-25 12:31 – Updated: 2026-07-25 12:31

Details

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.

Show details on source website

JSON

To clipboard

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  "affected": [],
  "aliases": [
    "CVE-2026-64483"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-25T10:17:33Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: firewire: isight: bound the sample count to the packet payload\n\nisight_packet() takes the frame count from the device iso packet and\nchecks it only against the device claimed iso length.\n\n\tcount = be32_to_cpu(payload-\u003esample_count);\n\tif (likely(count \u003c= (length - 16) / 4))\n\t\tisight_samples(isight, payload-\u003esamples, count);\n\nlength is the iso header data_length. It can be up to 0xffff. So the\ngate allows a count up to about 16379. isight_samples() then copies\ncount frames out of payload-\u003esamples into the PCM DMA buffer.\n\npayload-\u003esamples holds only 2 * MAX_FRAMES_PER_PACKET values. The\ndevice multiplexes two samples per frame. A count past\nMAX_FRAMES_PER_PACKET reads past the payload. A count past the buffer\nsize writes past runtime-\u003edma_area. The smallest PCM buffer is larger\nthan MAX_FRAMES_PER_PACKET. Bounding the count to MAX_FRAMES_PER_PACKET\nkeeps both the read and the write in range.\n\nA malicious or faulty Apple iSight on the FireWire bus reaches this\nduring a normal capture.\n\nAdd the MAX_FRAMES_PER_PACKET bound to the gate.",
  "id": "GHSA-j22x-mh97-frw2",
  "modified": "2026-07-25T12:31:37Z",
  "published": "2026-07-25T12:31:37Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64483"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/24423e0a9251d348c3f1fb0bb0e61b879e1e976c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/29b9667982e4df2ed7744f86b1144f8bb58eb698"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/31a01b70bb90e3ef3147f308e2ea899e1d2485ca"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/31da82b9676c6b112e7c72c7529e6812b919742a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3ed2fa1ed8cc65f910b8bbc0be3cc366b30f8478"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/57e4d9043afc1eaddee8f50d11def6e65415d273"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8e48a29813df8dd71503800b7acf69c12c035045"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ebbffacda6733dcbcef601b5b523460f8d8b671e"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

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

GHSA-J22X-MH97-FRW2

Tags

Sightings

Nomenclature