CVE-2026-64483None▾ SunlitIn 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 de…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Nov 6.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.2%
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.
Linux >= 3a691b28a0ca3cf4d9010c6158318159e0275d2c < 24423e0a9251d348c3f1fb0bb0e61b879e1e976cLinux >= 3a691b28a0ca3cf4d9010c6158318159e0275d2c < ebbffacda6733dcbcef601b5b523460f8d8b671eLinux >= 3a691b28a0ca3cf4d9010c6158318159e0275d2c < 57e4d9043afc1eaddee8f50d11def6e65415d273Linux >= 3a691b28a0ca3cf4d9010c6158318159e0275d2c < 3ed2fa1ed8cc65f910b8bbc0be3cc366b30f8478Linux >= 3a691b28a0ca3cf4d9010c6158318159e0275d2c < 31da82b9676c6b112e7c72c7529e6812b919742aLinux >= 3a691b28a0ca3cf4d9010c6158318159e0275d2c < 8e48a29813df8dd71503800b7acf69c12c035045Linux >= 3a691b28a0ca3cf4d9010c6158318159e0275d2c < 31a01b70bb90e3ef3147f308e2ea899e1d2485caLinux >= 3a691b28a0ca3cf4d9010c6158318159e0275d2c < 29b9667982e4df2ed7744f86b1144f8bb58eb698Linux 3.0Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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