bpf: Mark bpf_refcount field as unique

Answer in brief

CVE-2026-100074 records a Unknown severity vulnerability in bpf: Mark bpf_refcount field as unique. 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 25, 2026Updated Sep 25, 2026Source checked Sep 25, 2026First seen by HOL Sep 25, 2026Material review Sep 25, 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	>=d54730b50bae1f3119bd686d551d66f0fcc387ca <e42cede6f90177f4f92f80d3de18f628e61d2087 \|\| >=d54730b50bae1f3119bd686d551d66f0fcc387ca <641f814965d733936ca3618d4d5a12a8fa9be00e \|\| >=d54730b50bae1f3119bd686d551d66f0fcc387ca <61e655391cb19c31f94ecd4354f624c81ce4cf75	e42cede6f90177f4f92f80d3de18f628e61d2087, 641f814965d733936ca3618d4d5a12a8fa9be00e, 61e655391cb19c31f94ecd4354f624c81ce4cf75
Linux/Linuxgeneric	6.4	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to e42cede6f90177f4f92f80d3de18f628e61d2087 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 25, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 25, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 25, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: bpf: Mark bpf_refcount field as unique BPF_REFCOUNT is not marked as a unique field, while it should be. Fix this oversight.

Quoted source text, attributed separately from HOL analysis.