Bug 2540374 (CVE-2026-97510)

Summary:	CVE-2026-97510 kernel: thunderbolt: Release request if tb_cfg_request() fails in __tb_xdomain_response()
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	akhatavk, aos-team-art-private, asdas, dpaolell, jdelft, jupierce, lgarciaa, mbiarnes, ppalepu, ppostler, prdhamdh, rhel-process-autobot, sghai, sidsharm, suppawar, vlaad, watson-tool-maintainers
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
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Doc Text:	A flaw was found in the Linux kernel's Thunderbolt subsystem. When handling communication responses, a failure to set up a configuration request—such as when the control channel is already shut down—causes the system to return an error without releasing allocated memory. A local user or repeated communication errors can trigger this condition, potentially resulting in a denial of service (DoS) through system memory exhaustion.	Story Points:	---
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Last Closed:		Type:	---
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Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-09-24 16:34:08 UTC

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

thunderbolt: Release request if tb_cfg_request() fails in __tb_xdomain_response()

If tb_cfg_request() fails setting up the request (for example the
control channel is shut down already) it returns an error without
calling the callback. To avoid leaking that memory, call
tb_cfg_request_put() if tb_cfg_request() fails.

Comment 1 gkamathe 2026-09-28 16:09:55 UTC

Upstream advisory:
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-97510.mbox