CVE-2026-90045

7.8 HIGH

Published 2026-09-16 · Updated 2026-09-21

AI risk analysis

Summary: The flaw involves improper management of memory references in USB gadget ffs, leading to potential use-after-free conditions if a task exits prematurely during asynchronous request handling.
Exploitability: Exploitation requires the task to exit before completion handling, making it moderately difficult. Precondition is the presence of a task that can be controlled to exit at a specific time.
Blast radius: If exploited, this could lead to arbitrary code execution or system instability, impacting the integrity and availability of the system.
Detection: No reliable host or network indicator is derivable from the published description.
Prioritized remediation: Upgrade to the specific version 5.10.100 or later, as published in the advisory.

use-after-freekernelusbmemory-management

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

NVD description

In the Linux kernel, the following vulnerability has been resolved: USB: gadget: ffs: fix mm lifetime handling io_data stores a pointer to the submitting task's mm_struct, but does not currently hold a reference to it while async requests are pending. This can result in a use-after-free if the task exits before completion handling finishes. Take a reference with mmgrab() when queuing the read request and release it with mmdrop() on request completion.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

Data: NVD (public domain). Analysis: local $0 model. Defensive use only.