CVE-2026-64483 (GCVE-0-2026-64483)
Vulnerability from cvelistv5 – Published: 2026-07-25 08:51 – Updated: 2026-08-17 04:56
VLAI
EPSS
VEX
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
8 references
Impacted products
2 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) |
guessed | |
| 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) |
guessed |
{
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"sound/firewire/isight.c"
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{
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"status": "unaffected",
"version": "5.10.261",
"versionType": "semver"
},
{
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"version": "5.15.212",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "6.1.178",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.145",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.96",
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},
{
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"status": "unaffected",
"version": "6.18.39",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.4",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.0",
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},
{
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{
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},
{
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},
{
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},
{
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}
],
"negate": false,
"operator": "OR"
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],
"descriptions": [
{
"lang": "en",
"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."
}
],
"providerMetadata": {
"dateUpdated": "2026-08-17T04:56:30.281Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/24423e0a9251d348c3f1fb0bb0e61b879e1e976c"
},
{
"url": "https://git.kernel.org/stable/c/ebbffacda6733dcbcef601b5b523460f8d8b671e"
},
{
"url": "https://git.kernel.org/stable/c/57e4d9043afc1eaddee8f50d11def6e65415d273"
},
{
"url": "https://git.kernel.org/stable/c/3ed2fa1ed8cc65f910b8bbc0be3cc366b30f8478"
},
{
"url": "https://git.kernel.org/stable/c/31da82b9676c6b112e7c72c7529e6812b919742a"
},
{
"url": "https://git.kernel.org/stable/c/8e48a29813df8dd71503800b7acf69c12c035045"
},
{
"url": "https://git.kernel.org/stable/c/31a01b70bb90e3ef3147f308e2ea899e1d2485ca"
},
{
"url": "https://git.kernel.org/stable/c/29b9667982e4df2ed7744f86b1144f8bb58eb698"
}
],
"title": "ALSA: firewire: isight: bound the sample count to the packet payload",
"x_generator": {
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}
}
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-64483",
"datePublished": "2026-07-25T08:51:43.851Z",
"dateReserved": "2026-07-19T15:36:31.791Z",
"dateUpdated": "2026-08-17T04:56:30.281Z",
"state": "PUBLISHED"
},
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"date": "2026-09-25",
"epss": "0.0022",
"percentile": "0.11147"
},
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"cve": "CVE-2026-64483",
"id": "msrc_CVE-2026-64483",
"initial_release_date": "2026-07-26T01:09:25.000Z",
"product_status:known_affected": "1",
"source": "Microsoft CSAF VEX",
"status": "final",
"title": "ALSA: firewire: isight: bound the sample count to the packet payload",
"url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-64483.json",
"version": "2"
},
"nvd": {
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"product": "Linux",
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{
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},
{
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},
{
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"status": "unaffected",
"version": "6.1.178",
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},
{
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"versionType": "semver"
},
{
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},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.4",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"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."
}
],
"id": "CVE-2026-64483",
"lastModified": "2026-08-17T05:17:54.097",
"metrics": {},
"published": "2026-07-25T10:17:33.957",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/24423e0a9251d348c3f1fb0bb0e61b879e1e976c"
},
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/29b9667982e4df2ed7744f86b1144f8bb58eb698"
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"url": "https://git.kernel.org/stable/c/31a01b70bb90e3ef3147f308e2ea899e1d2485ca"
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},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Received"
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-09-14T19:49:13+00:00",
"cve": "CVE-2026-64483",
"id": "CVE-2026-64483",
"initial_release_date": "2026-07-25T00:00:00+00:00",
"product_status:known_affected": "76",
"product_status:known_not_affected": "198",
"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": "2026-09-22T16:52:41Z",
"cve": "CVE-2026-64483",
"id": "CVE-2026-64483",
"initial_release_date": "2026-07-25T15:58:29Z",
"product_status:first_fixed": "60",
"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": "13"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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.
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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.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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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.
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