ALSA: firewire: isight: bound the sample count to the packet payload
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.
CVE-2026-64483
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:CVE-2026-64483
Kernel
Source reference: /affected/1/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 5.10.261
Source reference:
/affected/1/ranges5.15.212Source reference:
/affected/1/ranges6.1.178Source reference:
/affected/1/ranges6.6.145Source reference:
/affected/1/ranges6.12.96Source reference:
/affected/1/ranges6.18.39Source reference:
/affected/1/ranges7.1.4Source reference:
/affected/1/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"type": "GIT",
"events": [
{
"introduced": "3a691b28a0ca3cf4d9010c6158318159e0275d2c"
},
{
"fixed": "24423e0a9251d348c3f1fb0bb0e61b879e1e976c"
},
{
"fixed": "ebbffacda6733dcbcef601b5b523460f8d8b671e"
},
{
"fixed": "57e4d9043afc1eaddee8f50d11def6e65415d273"
},
{
"fixed": "3ed2fa1ed8cc65f910b8bbc0be3cc366b30f8478"
},
{
"fixed": "31da82b9676c6b112e7c72c7529e6812b919742a"
},
{
"fixed": "8e48a29813df8dd71503800b7acf69c12c035045"
},
{
"fixed": "31a01b70bb90e3ef3147f308e2ea899e1d2485ca"
},
{
"fixed": "29b9667982e4df2ed7744f86b1144f8bb58eb698"
}
]
}
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64483.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "3.0.0"
},
{
"fixed": "5.10.261"
}
]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "5.11.0"
},
{
"fixed": "5.15.212"
}
]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "5.16.0"
},
{
"fixed": "6.1.178"
}
]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.2.0"
},
{
"fixed": "6.6.145"
}
]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.7.0"
},
{
"fixed": "6.12.96"
}
]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.13.0"
},
{
"fixed": "6.18.39"
}
]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.19.0"
},
{
"fixed": "7.1.4"
}
]
}
],
"package": {
"name": "Kernel",
"ecosystem": "Linux"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64483.json"
}
}
]- Related CVEs
- CVE-2026-64483
Source reference:
/id
Publisher severity
No explicit severity was provided.
- Event
- #50820 · Revision 1
- Added to Heist Feed
- Publisher date