CVE Catalog

CVE-2026-72153

Low risk· EPSS 12%
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.21%

12th percentile - higher than 12% of all known CVEs

Summary

In the Linux kernel, the irqchip/crossbar driver's crossbar_domain_free() uses a nulled hwirq as index, failing to free the correct entry and keeping the crossbar register connection active. This can lead to interrupt mapping errors.

Risk Assessment

Incorrect interrupt freeing can lead to hardware malfunction or potential out-of-bounds access.

Recommendation

Apply the Linux kernel patch that uses the correct GIC SPI index from the parent domain's irq_data to properly free the interrupt.

Other vulnerabilities in Linux kernel

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Original NVD description (English source)

In the Linux kernel, the following vulnerability has been resolved: irqchip/crossbar: Use correct index in crossbar_domain_free() crossbar_domain_free() resets the domain data and then uses the nulled out irq_data->hwirq member as index to reset the irq_map[] entry and to write the relevant crossbar register with a safe entry. That means it never frees the correct index and keeps the crossbar register connection to the source interrupt active. If it would not reset the domain data, then this would be even worse as irq_data->hwirq holds the source interrupt number, but both the map and register index need the corresponding GIC SPI number and not the source interrupt number. This might even result in an out of bounds access as the source interrupt number can be higher than the maximal index space. Fix this by using the GIC SPI index from the parent domain's irq_data.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS