powerpc/kexec_file: Fix null-ptr-def in extra size calculation (CVE-2026-89963) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-89963

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

Answer in brief

CVE-2026-89963 records a Unknown severity vulnerability in powerpc/kexec_file: Fix null-ptr-def in extra size calculation. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 16, 2026Updated Sep 16, 2026Source checked Sep 16, 2026First seen by HOL Sep 16, 2026Material review Sep 16, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=0d3ff067331ef84e7e7f49537d768881042ed5ba <11ef1c2a5dbe0bd8c1345f59bab7331d352f02cf \|\| >=0d3ff067331ef84e7e7f49537d768881042ed5ba <df45337587db21c502fe5251d3bcc7887428f4fb \|\| >=0d3ff067331ef84e7e7f49537d768881042ed5ba <4ff3d9fd71c7bc2fc81afdac1970d9c55a5c0dea \|\| >=0d3ff067331ef84e7e7f49537d768881042ed5ba <761eda315a6e1fda3e8e2185b28430771fb1ac29	11ef1c2a5dbe0bd8c1345f59bab7331d352f02cf, df45337587db21c502fe5251d3bcc7887428f4fb, 4ff3d9fd71c7bc2fc81afdac1970d9c55a5c0dea, 761eda315a6e1fda3e8e2185b28430771fb1ac29
Linux/Linuxgeneric	6.11	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 11ef1c2a5dbe0bd8c1345f59bab7331d352f02cf if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 16, 2026

Sources and claim methodology

Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.