Linux Kernel up to 7.1.3 ALSA FireWire iSight isight_packet sample_count buffer overflow

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8.4	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 7.1.3. It has been declared as very critical. This affects the function isight_packet of the component ALSA FireWire iSight. Executing a manipulation of the argument sample_count can lead to buffer overflow. This vulnerability is tracked as CVE-2026-64483. The attack is restricted to local execution. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Linux Kernel up to 7.1.3 and classified as very critical. This vulnerability affects the function isight_packet of the component ALSA FireWire iSight. The manipulation of the argument sample_count with an unknown input leads to a buffer overflow vulnerability. The CWE definition for the vulnerability is CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at git.kernel.org. This vulnerability was named CVE-2026-64483 since 07/19/2026. The exploitation appears to be easy. Local access is required to approach this attack. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 07/27/2026).

The vulnerability scanner Nessus provides a plugin with the ID 329926 (Linux Distros Unpatched Vulnerability : CVE-2026-64483), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.96, 6.18.39, 7.1.4 or 7.2-rc1 eliminates this vulnerability. Applying the patch 24423e0a9251d348c3f1fb0bb0e61b879e1e976c/ebbffacda6733dcbcef601b5b523460f8d8b671e/57e4d9043afc1eaddee8f50d11def6e65415d273/3ed2fa1ed8cc65f910b8bbc0be3cc366b30f8478/31da82b9676c6b112e7c72c7529e6812b919742a/8e48a29813df8dd71503800b7acf69c12c035045/31a01b70bb90e3ef3147f308e2ea899e1d2485ca/29b9667982e4df2ed7744f86b1144f8bb58eb698 is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (329926) and EUVD (EUVD-2026-48827). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 5.10.260
• 5.15.211
• 6.1.177
• 6.6.144
• 6.12.0
• 6.12.1
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• 6.12.95
• 6.18.0
• 6.18.1
• 6.18.2
• 6.18.3
• 6.18.4
• 6.18.5
• 6.18.6
• 6.18.7
• 6.18.8
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• 6.18.34
• 6.18.35
• 6.18.36
• 6.18.37
• 6.18.38
• 7.1.0
• 7.1.1
• 7.1.2
• 7.1.3

License

• open-source

Website

• Vendor: https://www.kernel.org/

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.8
VulDB Meta Temp Score: 8.4

VulDB Base Score: 8.8
VulDB Temp Score: 8.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 329926
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-64483

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.10.261/5.15.212/6.1.178/6.6.145/6.12.96/6.18.39/7.1.4/7.2-rc1
Patch: 24423e0a9251d348c3f1fb0bb0e61b879e1e976c/ebbffacda6733dcbcef601b5b523460f8d8b671e/57e4d9043afc1eaddee8f50d11def6e65415d273/3ed2fa1ed8cc65f910b8bbc0be3cc366b30f8478/31da82b9676c6b112e7c72c7529e6812b919742a/8e48a29813df8dd71503800b7acf69c12c035045/31a01b70bb90e3ef3147f308e2ea899e1d2485ca/29b9667982e4df2ed7744f86b1144f8bb58eb698

Timelineinfo

07/19/2026 CVE reserved
07/25/2026 +6 days Advisory disclosed
07/25/2026 +0 days VulDB entry created
07/27/2026 +1 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-64483 (🔒)
GCVE (CVE): GCVE-0-2026-64483
GCVE (VulDB): GCVE-100-383242
EUVD: 🔒

Entryinfo

Created: 07/25/2026 18:48
Updated: 07/27/2026 00:19
Changes: 07/25/2026 18:48 (60), 07/26/2026 09:04 (1), 07/27/2026 00:19 (2)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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