Bug 2552231 (CVE-2026-98415)

Summary:	CVE-2026-98415 kernel: soc: samsung: exynos-pmu: fix use-after-free of interrupt generator node
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
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 Linux kernel's Samsung Exynos Power Management Unit (PMU) driver. A local attacker could exploit a use-after-free vulnerability caused by the premature release of a device tree configuration node during CPU power management initialization. This issue may lead to a Denial of Service (DoS) via a system crash or unintended memory corruption.	Story Points:	---
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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 2026-10-14 13:53:41 UTC

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

soc: samsung: exynos-pmu: fix use-after-free of interrupt generator node

The setup_cpuhp_and_cpuidle() parses the device tree node for the
interrupt generation block via of_parse_phandle() and decrements its
reference count using of_node_put() immediately after fetching the resource
address. However, later the intr_gen_node pointer is passed into
of_syscon_register_regmap().

Fix this by declaring intr_gen_node with __free() and removing
of_node_put().

Comment 1 Mauro Matteo Cascella 2026-10-15 08:32:34 UTC

Upstream advisory:
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98415.mbox