A vulnerability in the Linux kernel related to USB driver resource management has been resolved. (CVE-2026-46103)
A vulnerability in the Linux kernel related to USB driver resource management has been resolved. The issue involved improper lifetime management of device-managed resources tied to USB interfaces, causing potential memory leaks when drivers are unbound without physical device disconnection. Specifically, the control message buffer lifetime was not correctly released on driver unbind, leading to resource leakage.
AI Analysis
Technical Summary
The vulnerability in the Linux kernel's USB driver subsystem was due to device-managed resources being tied to the parent USB device instead of the USB interface. This caused memory leaks when drivers were unbound without the device being physically disconnected, such as during probe deferral or configuration changes. The fix ensures that the control message buffer lifetime is properly released upon driver unbind, preventing resource leaks. The affected version explicitly stated is version 3.0.
Potential Impact
The vulnerability results in a memory leak (CWE-401) that can cause resource exhaustion and potentially disrupt system availability (denial of service). There is no impact on confidentiality or integrity. The attack vector requires local access with low privileges and no user interaction is needed.
Mitigation Recommendations
No official patch link is provided in the data, and patch status is not explicitly confirmed. Therefore, patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is confirmed, users should monitor for updates from the Linux kernel maintainers or Microsoft Security Response Center regarding this issue.
A vulnerability in the Linux kernel related to USB driver resource management has been resolved. (CVE-2026-46103)
Description
A vulnerability in the Linux kernel related to USB driver resource management has been resolved. The issue involved improper lifetime management of device-managed resources tied to USB interfaces, causing potential memory leaks when drivers are unbound without physical device disconnection. Specifically, the control message buffer lifetime was not correctly released on driver unbind, leading to resource leakage.
CVSS v3.1
Score 5.5medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in the Linux kernel's USB driver subsystem was due to device-managed resources being tied to the parent USB device instead of the USB interface. This caused memory leaks when drivers were unbound without the device being physically disconnected, such as during probe deferral or configuration changes. The fix ensures that the control message buffer lifetime is properly released upon driver unbind, preventing resource leaks. The affected version explicitly stated is version 3.0.
Potential Impact
The vulnerability results in a memory leak (CWE-401) that can cause resource exhaustion and potentially disrupt system availability (denial of service). There is no impact on confidentiality or integrity. The attack vector requires local access with low privileges and no user interaction is needed.
Mitigation Recommendations
No official patch link is provided in the data, and patch status is not explicitly confirmed. Therefore, patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is confirmed, users should monitor for updates from the Linux kernel maintainers or Microsoft Security Response Center regarding this issue.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_vex
- Csaf Version
- 2.0
- Publisher
- Microsoft Security Response Center
- Advisory Id
- msrc_CVE-2026-46103
- Cve Count
- 1
- Additional Cves
- []
- Cvss Version
- 3.1
Threat ID: 6a18ab82e29bf47b50288f03
Added to database: 05/28/2026, 20:54:26 UTC
Last enriched: 06/26/2026, 23:37:53 UTC
Last updated: 07/31/2026, 19:22:59 UTC
Views: 75
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