Bug 2536370 (CVE-2026-90213)

Summary:	CVE-2026-90213 kernel: firewire: core: fix memory leak in error path of build_tree()
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:
Fixed In Version:		Doc Type:	---
Doc Text:	A flaw was found in the FireWire core component of the Linux kernel. In the `build_tree()` function's error path, node instances can remain in a local linked list when the function returns after detecting an invalid value in the self ID sequence. This memory leak could allow a local attacker to consume system resources, potentially leading to a denial of service (DoS).	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 2026-09-17 17:34:57 UTC

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

firewire: core: fix memory leak in error path of build_tree()

In the error path of build_tree(), node instances can remain in the local
linked list when the function returns.

Whenever an invalid value is detected in the self ID sequence, each
allocated node instance is either an entry in the linked list or an
entry in the ports array of its parent node. Therefore, the allocate
node instances can be safely released by traversing the linked list from
its head.

Release the remaining node instances with for_each_fw_node() before
returning to the caller.

Comment 1 Mauro Matteo Cascella 2026-09-24 12:17:17 UTC

Upstream advisory:
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-90213.mbox