powerpc/kexec_file: Fix null-ptr-def in extra size calculation

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-89963
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-16 11:17:06 UTC
Updated2026-09-16 11:17:06 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: powerpc/kexec_file: Fix null-ptr-def in extra size calculation A static Sashiko AI review identified a potential NULL pointer dereference in kexec_extra_fdt_size_ppc64(). On platforms without any reserved memory regions, get_reserved_memory_ranges() can return 0 while leaving 'rmem' unallocated as NULL. Passing it directly leads to a kernel panic when evaluating 'rmem->nr_ranges'. Add a NULL check for 'rmem' to prevent this crash.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 0d3ff067331ef84e7e7f49537d768881042ed5ba 11ef1c2a5dbe0bd8c1345f59bab7331d352f02cf git Not specified
CNA Linux Linux affected 0d3ff067331ef84e7e7f49537d768881042ed5ba df45337587db21c502fe5251d3bcc7887428f4fb git Not specified
CNA Linux Linux affected 0d3ff067331ef84e7e7f49537d768881042ed5ba 4ff3d9fd71c7bc2fc81afdac1970d9c55a5c0dea git Not specified
CNA Linux Linux affected 0d3ff067331ef84e7e7f49537d768881042ed5ba 761eda315a6e1fda3e8e2185b28430771fb1ac29 git Not specified
CNA Linux Linux affected 6.11 Not specified
CNA Linux Linux unaffected 6.11 semver Not specified
CNA Linux Linux unaffected 6.12.110 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.51 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.5 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/761eda315a6e1fda3e8e2185b28430771fb1ac29 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/df45337587db21c502fe5251d3bcc7887428f4fb 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/11ef1c2a5dbe0bd8c1345f59bab7331d352f02cf 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/4ff3d9fd71c7bc2fc81afdac1970d9c55a5c0dea 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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