Bug 2464438 (CVE-2026-43008)

Summary:	CVE-2026-43008 kernel: gpio: qixis-fpga: Fix error handling for devm_regmap_init_mmio()
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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Doc Text:	A flaw was found in the Linux kernel's `qixis-fpga` driver. This vulnerability is due to incorrect error handling when initializing memory-mapped I/O (Input/Output) regions. An attacker could potentially exploit this flaw by triggering an error condition, which may lead to an invalid pointer dereference. This could result in system instability or a system crash, causing a Denial of Service (DoS).	Story Points:	---
Clone Of:		Environment:
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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 2026-05-01 15:06:49 UTC

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

gpio: qixis-fpga: Fix error handling for devm_regmap_init_mmio()

devm_regmap_init_mmio() returns an ERR_PTR() on failure, not NULL.
The original code checked for NULL which would never trigger on error,
potentially leading to an invalid pointer dereference.
Use IS_ERR() and PTR_ERR() to properly handle the error case.

Comment 1 Keith Grant 2026-05-01 16:08:39 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026050154-CVE-2026-43008-bd5e@gregkh/T