CVE-2026-89963 in Linux
Zusammenfassung
von MITRE • 16.09.2026
In the Linux kernel, the following vulnerability has been resolved:
powerpc/kexec_file: Fix null-ptr-def in extra size calculation
A static Sashiko AI review identified a potential NULL pointer dereference in kexec_extra_fdt_size_ppc64().
On platforms without any reserved memory regions, get_reserved_memory_ranges() can return 0 while leaving 'rmem' unallocated as NULL. Passing it directly leads to a kernel panic when evaluating 'rmem->nr_ranges'.
Add a NULL check for 'rmem' to prevent this crash.
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