ALSA: firewire: isight: bound the sample count to the packet payload
Summary
| CVE | CVE-2026-64483 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-07-25 10:17:33 UTC |
| Updated | 2026-07-25 10:17:33 UTC |
| 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. |
Risk And Classification
EPSS: 0.002200000 probability, percentile 0.125940000 (date 2026-07-25)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 3a691b28a0ca3cf4d9010c6158318159e0275d2c 24423e0a9251d348c3f1fb0bb0e61b879e1e976c git | Not specified |
| CNA | Linux | Linux | affected 3a691b28a0ca3cf4d9010c6158318159e0275d2c ebbffacda6733dcbcef601b5b523460f8d8b671e git | Not specified |
| CNA | Linux | Linux | affected 3a691b28a0ca3cf4d9010c6158318159e0275d2c 57e4d9043afc1eaddee8f50d11def6e65415d273 git | Not specified |
| CNA | Linux | Linux | affected 3a691b28a0ca3cf4d9010c6158318159e0275d2c 3ed2fa1ed8cc65f910b8bbc0be3cc366b30f8478 git | Not specified |
| CNA | Linux | Linux | affected 3a691b28a0ca3cf4d9010c6158318159e0275d2c 31da82b9676c6b112e7c72c7529e6812b919742a git | Not specified |
| CNA | Linux | Linux | affected 3a691b28a0ca3cf4d9010c6158318159e0275d2c 8e48a29813df8dd71503800b7acf69c12c035045 git | Not specified |
| CNA | Linux | Linux | affected 3a691b28a0ca3cf4d9010c6158318159e0275d2c 31a01b70bb90e3ef3147f308e2ea899e1d2485ca git | Not specified |
| CNA | Linux | Linux | affected 3a691b28a0ca3cf4d9010c6158318159e0275d2c 29b9667982e4df2ed7744f86b1144f8bb58eb698 git | Not specified |
| CNA | Linux | Linux | affected 3.0 | Not specified |
| CNA | Linux | Linux | unaffected 3.0 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.10.261 5.10.* semver | Not specified |
| CNA | Linux | Linux | unaffected 5.15.212 5.15.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.178 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.145 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.96 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.39 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.1.4 7.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2-rc1 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/57e4d9043afc1eaddee8f50d11def6e65415d273 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/24423e0a9251d348c3f1fb0bb0e61b879e1e976c | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/31da82b9676c6b112e7c72c7529e6812b919742a | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/31a01b70bb90e3ef3147f308e2ea899e1d2485ca | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/3ed2fa1ed8cc65f910b8bbc0be3cc366b30f8478 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/29b9667982e4df2ed7744f86b1144f8bb58eb698 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/ebbffacda6733dcbcef601b5b523460f8d8b671e | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/8e48a29813df8dd71503800b7acf69c12c035045 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.