CVE-2024-46822 arm64: acpi: Harden get_cpu_for_acpi_id() against missing CPU entry

In the Linux kernel, the following vulnerability has been resolved: arm64: acpi: Harden getcpuforacpiid against missing CPU entry In a review discussion of the changes to support vCPU hotplug where a check was added on the GICC being enabled if was online, it was noted that there is need to map...

CVE-2024-46822

CVE-2024-46822 αφορά Linux kernel, prädominantemente为 ARM64 架构，涉及 acpi_map_gic_cpu_interface() 中对 MPIDR 检查失败时导致 cpu_madt_gicc[cpu] 为 NULL 的情况，从而可能造成空指针解引用。修复为对 get_cpu_for_acpi_id() 的调用路径进行强化，确保获取到有效 CPU 条目后再进行索引，避免空指针 dereference。相关公开资料（如 Astra Linux、CIRCL/CVE 记录）确认了该漏洞存在于内核实现并已通过 Harden get_cpu...

CVE-2024-46822 arm64: acpi: Harden get_cpu_for_acpi_id() against missing CPU entry

In the Linux kernel, the following vulnerability has been resolved: arm64: acpi: Harden getcpuforacpiid against missing CPU entry In a review discussion of the changes to support vCPU hotplug where a check was added on the GICC being enabled if was online, it was noted that there is need to map...