Bug 2427113 (CVE-2025-68766)

Summary: CVE-2025-68766 kernel: irqchip/mchp-eic: Fix error code in mchp_eic_domain_alloc()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
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OS: Linux   
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Description OSIDB Bzimport 2026-01-05 10:02:09 UTC 
In the Linux kernel, the following vulnerability has been resolved:

irqchip/mchp-eic: Fix error code in mchp_eic_domain_alloc()

If irq_domain_translate_twocell() sets "hwirq" to >= MCHP_EIC_NIRQ (2) then
it results in an out of bounds access.

The code checks for invalid values, but doesn't set the error code.  Return
-EINVAL in that case, instead of returning success.
Comment 1 Vipul Nair 2026-01-05 12:18:17 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026010519-CVE-2025-68766-0898@gregkh/T