powerpc/kexec_file: Fix null-ptr-def in extra size calculation
Published Sep 16, 2026
No CVSS score
EPSS 0.21%
Description
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.
Affected products
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- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version
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- Version 6.11StatusaffectedConstraints-
- Version 0StatusunaffectedConstraints<6.11
- Version 6.12.110StatusunaffectedConstraints<=6.12.*
- Version 6.18.51StatusunaffectedConstraints<=6.18.*
- Version 7.2.5StatusunaffectedConstraints<=7.2.*
- Version 7.3-rc1StatusunaffectedConstraints<=*
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
No data.
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Weaknesses (0)
No CWE recorded.
References (4)
- 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
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner Linux
Published Sep 16, 2026
Updated Sep 16, 2026
Reserved Sep 11, 2026
Link CVE-2026-89963
CISA Vulnrichment
Updated n/a