{"id":"CVE-2026-89963","published":"2026-09-16T11:17:06.807","lastModified":"2026-09-16T11:17:06.807","description":"In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/kexec_file: Fix null-ptr-def in extra size calculation\n\nA static Sashiko AI review identified a potential NULL pointer\ndereference in kexec_extra_fdt_size_ppc64().\n\nOn platforms without any reserved memory regions,\nget_reserved_memory_ranges() can return 0 while leaving 'rmem'\nunallocated as NULL. Passing it directly leads to a kernel panic when\nevaluating 'rmem->nr_ranges'.\n\nAdd a NULL check for 'rmem' to prevent this crash.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/11ef1c2a5dbe0bd8c1345f59bab7331d352f02cf","tags":[]},{"url":"https://git.kernel.org/stable/c/4ff3d9fd71c7bc2fc81afdac1970d9c55a5c0dea","tags":[]},{"url":"https://git.kernel.org/stable/c/761eda315a6e1fda3e8e2185b28430771fb1ac29","tags":[]},{"url":"https://git.kernel.org/stable/c/df45337587db21c502fe5251d3bcc7887428f4fb","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}