CVE-2026-90120
HighCVSS 8.4Exploitation Probability (EPSS)
Low risk9th percentile - higher than 9% of all known CVEs
Summary
In the Linux kernel, gic_acpi_parse_iaffid() does not check the return value of get_logical_index(), which may be an error value when a MADT GICC entry does not correspond to a recognized logical CPU. This may result in out-of-bounds indexing of a per_cpu variable array and memory corruption.
Risk Assessment
Out-of-bounds indexing of a per_cpu array may corrupt kernel memory, leading to a crash or potential privilege escalation.
Recommendation
Update the Linux kernel to a version with the fix that checks the get_logical_index() return value before use.
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Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: irqchip/gic-v5: Check get_logical_index() return value in MADT IAFFID parsing In gic_acpi_parse_iaffid() a given MADT GICC entry might not correspond to a logical cpu recognized by the kernel, resulting in the cpu variable initialization to an error value. Currently, the get_logical_index() return value is not checked for failure, which might result in out-of-bounds memory corruption while trying to index a per_cpu variable array. Add a check to evaluate get_logical_index() return value.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS