SB2026080771 - Use-after-free in Linux kernel udc bdc driver

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Main Vulnerability Database SB2026080771

SB2026080771 - Use-after-free in Linux kernel udc bdc driver

Published: August 7, 2026

Security Bulletin ID SB2026080771
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Use-after-free (CVE-ID: CVE-2026-64583)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to a use-after-free in the Broadcom BDC USB gadget UDC driver IRQ handler and delayed work processing when tearing down the driver during device removal. A local user can trigger a shared interrupt or delayed work execution during teardown to cause a denial of service.

The issue occurs in the window after teardown of endpoint and DMA-related structures begins while the IRQ handler remains deliverable, and delayed work may also execute after removal.


Remediation

Install update from vendor's website.

References