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.
                
            Metrics
Affected Vendors & Products
References
        History
                    Mon, 03 Nov 2025 23:30:00 +0000
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Wed, 14 May 2025 02:30:00 +0000
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        Redhat
         Redhat enterprise Linux  | 
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| CPEs | cpe:/a:redhat:enterprise_linux:9 cpe:/o:redhat:enterprise_linux:9  | 
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        Redhat
         Redhat enterprise Linux  | 
Wed, 02 Oct 2024 14:45:00 +0000
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        Linux
         Linux linux Kernel  | 
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| Weaknesses | CWE-476 | |
| CPEs | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
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        Linux
         Linux linux Kernel  | 
Sun, 29 Sep 2024 15:30:00 +0000
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Sat, 28 Sep 2024 01:15:00 +0000
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Fri, 27 Sep 2024 12:45:00 +0000
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| 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. | |
| Title | arm64: acpi: Harden get_cpu_for_acpi_id() against missing CPU entry | |
| References | 
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Status: PUBLISHED
Assigner: Linux
Published: 2024-09-27T12:39:23.345Z
Updated: 2025-11-03T22:19:12.435Z
Reserved: 2024-09-11T15:12:18.285Z
Link: CVE-2024-46822
Updated: 2024-09-29T14:13:39.887Z
Status : Modified
Published: 2024-09-27T13:15:14.830
Modified: 2025-11-03T23:16:05.160
Link: CVE-2024-46822