{"id":"CVE-2026-89963","revision":"e0021fc80b51497694e2a1228756f59a","records":[{"revision":"e0021fc80b51497694e2a1228756f59a","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-89963","aliases":[],"title":"powerpc/kexec_file: Fix null-ptr-def in extra size calculation","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.","state":0,"publishedAt":"2026-09-16T10:32:45.336+00:00","modifiedAt":"2026-10-19T08:55:36.947+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"arch/powerpc/kexec/file_load_64.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"0d3ff067331ef84e7e7f49537d768881042ed5ba\",\n                            \"lessThan\": \"11ef1c2a5dbe0bd8c1345f59bab7331d352f02cf\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"0d3ff067331ef84e7e7f49537d768881042ed5ba\",\n                            \"lessThan\": \"df45337587db21c502fe5251d3bcc7887428f4fb\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"0d3ff067331ef84e7e7f49537d768881042ed5ba\",\n                            \"lessThan\": \"4ff3d9fd71c7bc2fc81afdac1970d9c55a5c0dea\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"0d3ff067331ef84e7e7f49537d768881042ed5ba\",\n                            \"lessThan\": \"761eda315a6e1fda3e8e2185b28430771fb1ac29\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"arch/powerpc/kexec/file_load_64.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.11\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.11\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.110\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.51\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.5\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/11ef1c2a5dbe0bd8c1345f59bab7331d352f02cf","https://git.kernel.org/stable/c/df45337587db21c502fe5251d3bcc7887428f4fb","https://git.kernel.org/stable/c/4ff3d9fd71c7bc2fc81afdac1970d9c55a5c0dea","https://git.kernel.org/stable/c/761eda315a6e1fda3e8e2185b28430771fb1ac29"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89963","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-89963","identifiers":["CVE-2026-89963"]},"retained":false,"historicalAffected":[]}],"coverage":[]}