CVE-2026-64547: net: usb: net1080: validate packet_len before pad-byte access in rx_fixup

CVE-2026-64547 is a vulnerability in net: usb: net1080: validate packet_len before pad-byte access in rx_fixup, rated Moderate by Microsoft, with a CVSS 3.1 base score of 4.6 (Medium). An attacker can exploit it by an attacker with physical access, without any privileges and without user interaction. Microsoft has not reported exploitation in the wild. The EPSS model estimates a 0.28% probability of exploitation activity in the next 30 days, higher than 21% of all scored vulnerabilities. Microsoft released the fix on 6 August 2026, outside Patch Tuesday. It affects 1 product in 1 product family (Open Source Software).

Key facts

CVE ID: CVE-2026-64547
Severity: Medium CVSS 4.6
Microsoft severity: Moderate
Exploited in the wild: No
Publicly disclosed: No
Weakness: CWE-125
EPSS: 0.28% (percentile 21%)
CISA KEV: Not listed
Released: 6 August 2026
Last updated: 6 August 2026
Patch Tuesday: July 2026 Patch Tuesday
Product families: Open Source Software

CVSS score and vector

Microsoft scores CVE-2026-64547 at 4.6 (temporal 4.6) using CVSS 3.1. Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Metric	Value
Attack vector	Physical
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality impact	None
Integrity impact	None
Availability impact	High

NVD scores it 8.1 (HIGH) with CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.

Affected products (1)

Open Source Software

Product	Security update	Type	Fixed build	Restart
azl3 kernel 6.6.144.1-1 on Azure Linux 3.0	CBL-Mariner Releases	Security Update	6.6.145.2-1	No

NIST NVD data

NVD status: Awaiting Analysis
NVD CVSS: 8.1 (HIGH)
NVD weakness: CWE-125
Published to NVD: 27 July 2026
NVD last modified: 3 November 2026

References

Revision history

Version	Date	Description
1.0	6 August 2026	Information published.