CVE-2026-64483 is a vulnerability in Linux Kernel
Published on July 25, 2026
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.
Products Associated with CVE-2026-64483
Want to know whenever a new CVE is published for Linux Kernel? stack.watch will email you.
Affected Versions
Linux:- Version 3a691b28a0ca3cf4d9010c6158318159e0275d2c and below 24423e0a9251d348c3f1fb0bb0e61b879e1e976c is affected.
- Version 3a691b28a0ca3cf4d9010c6158318159e0275d2c and below ebbffacda6733dcbcef601b5b523460f8d8b671e is affected.
- Version 3a691b28a0ca3cf4d9010c6158318159e0275d2c and below 57e4d9043afc1eaddee8f50d11def6e65415d273 is affected.
- Version 3a691b28a0ca3cf4d9010c6158318159e0275d2c and below 3ed2fa1ed8cc65f910b8bbc0be3cc366b30f8478 is affected.
- Version 3a691b28a0ca3cf4d9010c6158318159e0275d2c and below 31da82b9676c6b112e7c72c7529e6812b919742a is affected.
- Version 3a691b28a0ca3cf4d9010c6158318159e0275d2c and below 8e48a29813df8dd71503800b7acf69c12c035045 is affected.
- Version 3a691b28a0ca3cf4d9010c6158318159e0275d2c and below 31a01b70bb90e3ef3147f308e2ea899e1d2485ca is affected.
- Version 3a691b28a0ca3cf4d9010c6158318159e0275d2c and below 29b9667982e4df2ed7744f86b1144f8bb58eb698 is affected.
- Version 3.0 is affected.
- Before 3.0 is unaffected.
- Version 5.10.261, <= 5.10.* is unaffected.
- Version 5.15.212, <= 5.15.* is unaffected.
- Version 6.1.178, <= 6.1.* is unaffected.
- Version 6.6.145, <= 6.6.* is unaffected.
- Version 6.12.96, <= 6.12.* is unaffected.
- Version 6.18.39, <= 6.18.* is unaffected.
- Version 7.1.4, <= 7.1.* is unaffected.
- Version 7.2-rc1, <= * is unaffected.