CVE-2026-90120

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux35866efa52feaf48cc54a0745851a555654e1446 < 6caeb878f809bdf0aec2fdd96f3d41ef4b69fc69affected
LinuxLinux35866efa52feaf48cc54a0745851a555654e1446 < 328affc639ce9873a7a0a3fd6b8339f19767529baffected
LinuxLinux7.0affected
LinuxLinux0 < 7.0unaffected
LinuxLinux7.2.6 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References