CVE-2026-89963powerpc/kexec_file: Fix null-ptr-def in extra size calculation
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In 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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 19, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 0d3ff067331ef84e7e7f49537d768881042ed5ba before 11ef1c2a5dbe0bd8c1345f59bab7331d352f02cf; from 0d3ff067331ef84e7e7f49537d768881042ed5ba before df45337587db21c502fe5251d3bcc7887428f4fb; from 0d3ff067331ef84e7e7f49537d768881042ed5ba before 4ff3d9fd71c7bc2fc81afdac1970d9c55a5c0dea; from 0d3ff067331ef84e7e7f49537d768881042ed5ba before 761eda315a6e1fda3e8e2185b28430771fb1ac29 | CNA record |
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
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.