{"cve":"CVE-2026-89963","nvd":{"published":"2026-09-16T11:17:06.807","modified":"2026-10-19T09:18:42.640","status":"Received","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.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/11ef1c2a5dbe0bd8c1345f59bab7331d352f02cf","https://git.kernel.org/stable/c/4ff3d9fd71c7bc2fc81afdac1970d9c55a5c0dea","https://git.kernel.org/stable/c/761eda315a6e1fda3e8e2185b28430771fb1ac29","https://git.kernel.org/stable/c/df45337587db21c502fe5251d3bcc7887428f4fb"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:54:41.405518556+00:00"},"epss":{"cve":"CVE-2026-89963","score":0.00209,"percentile":0.10939,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}