Bug 2513456 (CVE-2026-68374)

Summary:	CVE-2026-68374 kernel: usb: core: sysfs: add lock to bos_descriptors_read()
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	rhel-process-autobot, watson-tool-maintainers
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	A flaw was found in the Linux kernel's USB core subsystem. A missing synchronization mechanism in the `bos_descriptors_read()` function allows for a use-after-free vulnerability. This occurs when the `udev->bos` object is accessed while it is simultaneously being freed, potentially leading to a system crash (denial of service) or, in some cases, arbitrary code execution.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-08-10 12:38:23 UTC

In the Linux kernel, the following vulnerability has been resolved:

usb: core: sysfs: add lock to bos_descriptors_read()

Add a lock to the function bos_descriptors_read().

This function accesses udev->bos, which could be simultaneously freed in
usb_reset_and_verify_device(), a function that is commonly called in
drivers all over the kernel.

Comment 1 Mauro Matteo Cascella 2026-08-11 11:23:37 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026081043-CVE-2026-68374-2423@gregkh/T