CVE-2024-46822: Linux Kernel

Medium severity, CVSS 5.5. EPSS: 0.3% chance of exploitation in the next 30 days.

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.

Affected products

• Linux Linux Kernel: before 5.4.284 (fixed in 5.4.284); from 5.5, before 5.10.226 (fixed in 5.10.226); from 5.11, before 5.15.167 (fixed in 5.15.167); from 5.16, before 6.1.110 (fixed in 6.1.110); from 6.2, before 6.6.51 (fixed in 6.6.51); from 6.7, before 6.10.10 (fixed in 6.10.10)

Published 2024-09-27. Last modified 2026-06-17.