{"id":"CVE-2026-89963","summary":"powerpc/kexec_file: Fix null-ptr-def in extra size calculation","details":"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-\u003enr_ranges'.\n\nAdd a NULL check for 'rmem' to prevent this crash.","modified":"2026-09-17T03:47:20.416285166Z","published":"2026-09-16T10:32:45.336Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89963.json"},"references":[{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"},{"type":"WEB","url":"https://git.kernel.org/stable/c/11ef1c2a5dbe0bd8c1345f59bab7331d352f02cf"},{"type":"WEB","url":"https://git.kernel.org/stable/c/4ff3d9fd71c7bc2fc81afdac1970d9c55a5c0dea"},{"type":"WEB","url":"https://git.kernel.org/stable/c/761eda315a6e1fda3e8e2185b28430771fb1ac29"},{"type":"WEB","url":"https://git.kernel.org/stable/c/df45337587db21c502fe5251d3bcc7887428f4fb"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89963.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89963"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0d3ff067331ef84e7e7f49537d768881042ed5ba"},{"fixed":"11ef1c2a5dbe0bd8c1345f59bab7331d352f02cf"},{"fixed":"df45337587db21c502fe5251d3bcc7887428f4fb"},{"fixed":"4ff3d9fd71c7bc2fc81afdac1970d9c55a5c0dea"},{"fixed":"761eda315a6e1fda3e8e2185b28430771fb1ac29"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89963.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.11.0"},{"fixed":"6.12.110"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.51"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-89963.json"}}],"schema_version":"1.9.0"}