SB20261022372 - Use-after-free in Linux kernel usb core driver

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Main Vulnerability Database SB20261022372

SB20261022372 - Use-after-free in Linux kernel usb core driver

Published: October 22, 2026

Security Bulletin ID SB20261022372
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-2026-98763)

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 potentially cause a denial of service through a kernel use-after-free.

The vulnerability exists due to incomplete clearing of endpoint pointers in usb_disable_endpoint() when disabling a non-zero USB control endpoint with reset_hardware set. A local user can trigger this endpoint lifecycle to leave the opposite direction's endpoint array entry pointing to disabled or freed memory, potentially causing a kernel crash if the stale pointer is subsequently used.


Remediation

Install update from vendor's website.

References