Bug 2555209 (CVE-2026-98835)

Summary:	CVE-2026-98835 kernel: iio: accel: kionix-kx022a: Fix array boundary check
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:
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Doc Text:	A flaw was found in the Linux kernel's Kionix KX022A accelerometer driver. A local user could trigger a Denial of Service (DoS) or kernel memory disclosure due to an off-by-one array bounds validation check when converting device register values to array indices. This flaw leads to an out-of-bounds read beyond the allocated buffer, potentially crashing the system.	Story Points:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-10-18 16:02:02 UTC

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

iio: accel: kionix-kx022a: Fix array boundary check

The driver performs a sanity check for an array size, when converting a
register value to an array index. The check incorrectly accepts the
sizeof(array) as a last index, when last valid index should be
sizeof(array) - 1.

Fix the check by bailing out when index >= sizeof(array).

Comment 1 Mauro Matteo Cascella 2026-10-23 21:14:49 UTC

Upstream advisory:
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98835.mbox