CVE-2026-64483

Kernel memory corruption via unchecked iSight sample count

Published Jul 25, 2026 · Updated Jul 25, 2026

Buffer overflow in the Linux Kernel ALSA FireWire iSight driver allows physically proximate attackers to corrupt kernel memory. The isight_packet() handler accepts sample_count values up to the packet's claimed ISO length, then isight_samples() copies that many frames beyond the fixed payload and PCM DMA buffer. Reaching the flaw requires a malicious or faulty Apple iSight device on the FireWire bus during audio capture; the out-of-bounds read and write can expose or corrupt kernel memory and destabilize the system.

CVSS severity7.0
High
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in the Linux Kernel ALSA FireWire iSight driver allows physically proximate attackers to corrupt kernel memory. The isight_packet() handler accepts sample_count values up to the packet's claimed ISO length, then isight_samples() copies that many frames beyond the fixed payload and PCM DMA buffer. Reaching the flaw requires a malicious or faulty Apple iSight device on the FireWire bus during audio capture; the out-of-bounds read and write can expose or corrupt kernel memory and destabilize the system.

The record

CVE
CVE-2026-64483
Published
Jul 25, 2026
Updated
Jul 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-120, T1200
Attack vector
physical
Privileges
Unavailable

Timeline

How it unfolded

  1. Jul 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.0
  2. Affected versionversion=3a691b28a0ca3cf4d9010c6158318159e0275d2c <24423e0a9251d348c3f1fb0bb0e61b879e1e976c
  3. Affected versionversion=3a691b28a0ca3cf4d9010c6158318159e0275d2c <29b9667982e4df2ed7744f86b1144f8bb58eb698
  4. Affected versionversion=3a691b28a0ca3cf4d9010c6158318159e0275d2c <31a01b70bb90e3ef3147f308e2ea899e1d2485ca
  5. Affected versionversion=3a691b28a0ca3cf4d9010c6158318159e0275d2c <31da82b9676c6b112e7c72c7529e6812b919742a
  6. Affected versionversion=3a691b28a0ca3cf4d9010c6158318159e0275d2c <3ed2fa1ed8cc65f910b8bbc0be3cc366b30f8478
  7. Affected versionversion=3a691b28a0ca3cf4d9010c6158318159e0275d2c <57e4d9043afc1eaddee8f50d11def6e65415d273
  8. Affected versionversion=3a691b28a0ca3cf4d9010c6158318159e0275d2c <8e48a29813df8dd71503800b7acf69c12c035045
  9. Affected versionversion=3a691b28a0ca3cf4d9010c6158318159e0275d2c <ebbffacda6733dcbcef601b5b523460f8d8b671e

What conditions does exploitation require?

Attack vectorphysical
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linux Kernelversion=3.0; version=3a691b28a0ca3cf4d9010c6158318159e0275d2c <24423e0a9251d348c3f1fb0bb0e61b879e1e976c; version=3a691b28a0ca3cf4d9010c6158318159e0275d2c <29b9667982e4df2ed7744f86b1144f8bb58eb698; version=3a691b28a0ca3cf4d9010c6158318159e0275d2c <31a01b70bb90e3ef3147f308e2ea899e1d2485ca; version=3a691b28a0ca3cf4d9010c6158318159e0275d2c <31da82b9676c6b112e7c72c7529e6812b919742a; version=3a691b28a0ca3cf4d9010c6158318159e0275d2c <3ed2fa1ed8cc65f910b8bbc0be3cc366b30f8478; version=3a691b28a0ca3cf4d9010c6158318159e0275d2c <57e4d9043afc1eaddee8f50d11def6e65415d273; version=3a691b28a0ca3cf4d9010c6158318159e0275d2c <8e48a29813df8dd71503800b7acf69c12c035045; version=3a691b28a0ca3cf4d9010c6158318159e0275d2c <ebbffacda6733dcbcef601b5b523460f8d8b671e

Published CVSS scores

7.0Red HatCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorphysical
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1200Hardware Additions

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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