CVE-2024-46822
Description
In the Linux kernel, the following vulnerability has been resolved: arm64: acpi: Harden get_cpu_for_acpi_id() 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 back to the cpu and use that to index into a cpumask. As such, a valid ID is needed. If an MPIDR check fails in acpi_map_gic_cpu_interface() it is possible for the entry in cpu_madt_gicc[cpu] == NULL. This function would then cause a NULL pointer dereference. Whilst a path to trigger this has not been established, harden this caller against the possibility.
How to fix
- linux linux_kernel5.4.284, 5.10.226, 5.15.167, 6.1.110, 6.6.51, 6.10.10 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | v < 5.4.284, 5.5 ≤ v < 5.10.226, 5.11 ≤ v < 5.15.167, 5.16 ≤ v < 6.1.110, 6.2 ≤ v < 6.6.51, 6.7 ≤ v < 6.10.10 | 5.4.284, 5.10.226, 5.15.167, 6.1.110, 6.6.51, 6.10.10 |
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