Bug 2484437 (CVE-2026-46261)

Summary: CVE-2026-46261 kernel: spi: wpcm-fiu: Fix potential NULL pointer dereference in wpcm_fiu_probe()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
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Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Doc Text:
A flaw was found in the Linux kernel. A null pointer dereference in the `wpcm-fiu` Serial Peripheral Interface (SPI) driver, specifically when `platform_get_resource_byname()` returns a null value, could lead to a system crash. This vulnerability could allow a local attacker to cause a Denial of Service (DoS).
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Description OSIDB Bzimport 2026-06-03 18:01:24 UTC 
In the Linux kernel, the following vulnerability has been resolved:

spi: wpcm-fiu: Fix potential NULL pointer dereference in wpcm_fiu_probe()

platform_get_resource_byname() can return NULL, which would cause a crash
when passed the pointer to resource_size().

Move the fiu->memory_size assignment after the error check for
devm_ioremap_resource() to prevent the potential NULL pointer dereference.
Comment 1 Keith Grant 2026-06-03 20:24:12 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026060336-CVE-2026-46261-9058@gregkh/T