CVE-2026-64483: In the Linux kernel, the following vulnerability has been resolved: ALSA: firewire: isight: bound the sample count to the packet payload isight_pack...

Description

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.

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

Vendor	Product	Versions
Linux	Linux	>= 3a691b28a0ca3cf4d9010c6158318159e0275d2c, < 24423e0a9251d348c3f1fb0bb0e61b879e1e976c; >= 3a691b28a0ca3cf4d9010c6158318159e0275d2c, < ebbffacda6733dcbcef601b5b523460f8d8b671e; >= 3a691b28a0ca3cf4d9010c6158318159e0275d2c, < 57e4d9043afc1eaddee8f50d11def6e65415d273; >= 3a691b28a0ca3cf4d9010c6158318159e0275d2c, < 3ed2fa1ed8cc65f910b8bbc0be3cc366b30f8478; >= 3a691b28a0ca3cf4d9010c6158318159e0275d2c, < 31da82b9676c6b112e7c72c7529e6812b919742a; >= 3a691b28a0ca3cf4d9010c6158318159e0275d2c, < 8e48a29813df8dd71503800b7acf69c12c035045; >= 3a691b28a0ca3cf4d9010c6158318159e0275d2c, < 31a01b70bb90e3ef3147f308e2ea899e1d2485ca; >= 3a691b28a0ca3cf4d9010c6158318159e0275d2c, < 29b9667982e4df2ed7744f86b1144f8bb58eb698
Linux	Linux	3.0

References

Timeline

Published: Jul 25, 2026
Last Modified: Jul 25, 2026
Status: Received

Frequently Asked Questions

What is CVE-2026-64483?

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.

How severe is CVE-2026-64483?

Severity scoring for CVE-2026-64483 is pending analysis.

How do I fix CVE-2026-64483?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

How Strix Helps

Related CVEs from 2026

View all 2026CVEs →