{"id":"CVE-2026-89963","state":"PUBLISHED","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.","publishedAt":"2026-09-16T10:32:45.336Z","updatedAt":"2026-10-19T08:55:36.947Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"0d3ff067331ef84e7e7f49537d768881042ed5ba","status":"affected","lessThan":"11ef1c2a5dbe0bd8c1345f59bab7331d352f02cf","versionType":"git"},{"version":"0d3ff067331ef84e7e7f49537d768881042ed5ba","status":"affected","lessThan":"df45337587db21c502fe5251d3bcc7887428f4fb","versionType":"git"},{"version":"0d3ff067331ef84e7e7f49537d768881042ed5ba","status":"affected","lessThan":"4ff3d9fd71c7bc2fc81afdac1970d9c55a5c0dea","versionType":"git"},{"version":"0d3ff067331ef84e7e7f49537d768881042ed5ba","status":"affected","lessThan":"761eda315a6e1fda3e8e2185b28430771fb1ac29","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/powerpc/kexec/file_load_64.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.11","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.11","versionType":"semver"},{"version":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.51","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.5","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/powerpc/kexec/file_load_64.c"]}],"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"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:26.108Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/89xxx/CVE-2026-89963.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-89963","state":"PUBLISHED","datePublished":"2026-09-16T10:32:45.336Z","dateUpdated":"2026-10-19T08:55:36.947Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-11T19:38:34.778Z"},"containers":{"cna":{"title":"powerpc/kexec_file: Fix null-ptr-def in extra size calculation","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"0d3ff067331ef84e7e7f49537d768881042ed5ba","status":"affected","lessThan":"11ef1c2a5dbe0bd8c1345f59bab7331d352f02cf","versionType":"git"},{"version":"0d3ff067331ef84e7e7f49537d768881042ed5ba","status":"affected","lessThan":"df45337587db21c502fe5251d3bcc7887428f4fb","versionType":"git"},{"version":"0d3ff067331ef84e7e7f49537d768881042ed5ba","status":"affected","lessThan":"4ff3d9fd71c7bc2fc81afdac1970d9c55a5c0dea","versionType":"git"},{"version":"0d3ff067331ef84e7e7f49537d768881042ed5ba","status":"affected","lessThan":"761eda315a6e1fda3e8e2185b28430771fb1ac29","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/powerpc/kexec/file_load_64.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.11","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.11","versionType":"semver"},{"version":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.51","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.5","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/powerpc/kexec/file_load_64.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/11ef1c2a5dbe0bd8c1345f59bab7331d352f02cf"},{"url":"https://git.kernel.org/stable/c/df45337587db21c502fe5251d3bcc7887428f4fb"},{"url":"https://git.kernel.org/stable/c/4ff3d9fd71c7bc2fc81afdac1970d9c55a5c0dea"},{"url":"https://git.kernel.org/stable/c/761eda315a6e1fda3e8e2185b28430771fb1ac29"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T08:55:36.947Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.11","versionEndExcluding":"6.12.110"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.11","versionEndExcluding":"6.18.51"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.11","versionEndExcluding":"7.2.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.11","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}