Bug 2464493 (CVE-2026-31758)

Summary:	CVE-2026-31758 kernel: usb: usbtmc: Flush anchored URBs in usbtmc_release
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
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Fixed In Version:		Doc Type:	---
Doc Text:	A flaw was found in the Linux kernel's usbtmc module. This vulnerability occurs because pending anchored Universal Serial Bus (USB) Request Blocks (URBs) are not flushed or killed when the usbtmc_release function is called. This can result in use-after-free errors, which could potentially lead to system crashes or, in some scenarios, 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 2026-05-01 15:09:52 UTC

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

usb: usbtmc: Flush anchored URBs in usbtmc_release

When calling usbtmc_release, pending anchored URBs must be flushed or
killed to prevent use-after-free errors (e.g. in the HCD giveback
path). Call usbtmc_draw_down() to allow anchored URBs to be completed.

Comment 1 Keith Grant 2026-05-01 22:32:17 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026050144-CVE-2026-31758-8487@gregkh/T