of/overlay: only treat a positive changeset id as registered
CVSS score
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EPSS probability
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Risk score
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Published
1 d ago
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Vulnerability description
CVE AI research
DayBreach AI Explanation
Verified against sourcesSources read
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Source agreement
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Evidence confidence
%55
Short explanation
A vulnerability exists in the Linux kernel of/overlay component where of_overlay_fdt_apply() improperly handles negative ID return values during failure conditions, resulting in a NULL pointer dereference upon allocation failure.
This vulnerability creates memory management flaws that can lead to kernel-level crashes or instability.
What should be done?
- Ensure free_overlay_changeset() treats only a strict-positive ID as registered
- Follow vendor advisories
Chain of evidence and sources
of_overlay_fdt_apply() fonksiyonu idr_alloc() dönüş değerini ovcs->id içinde saklar ve başarısızlık durumunda değer negatiftir.
free_overlay_changeset() fonksiyonu negatif kimliği işleyerek başlatılmamış liste üzerinde list_del() çalıştırır ve NULL hatasına neden olur.
Show the technical text from the sources
In the Linux kernel, the following vulnerability has been resolved: of/overlay: only treat a positive changeset id as registered of_overlay_fdt_apply() stores the idr_alloc() return value in ovcs->id before checking it. On failure the stored id is negative, free_overlay_changeset()'s "if (ovcs->id)" check passes, idr_remove() is called with a negative id and list_del() runs on ovcs->ovcs_list, which is not initialized until after the id allocation. An allocation failure at that point dereferences NULL. Make free_overlay_changeset() treat only a strict-positive id as registered. The rest of the function already copes with a partially-initialized ovcs, so the error path stays a plain goto err_free_ovcs.
Explanation produced with the local gemini-flash-lite-latest model. Numerical metrics and the KEV, patch and exploit statuses are not determined by AI.
IMPACT: Affected Products and Software
RED HAT CSAF/VEX: Product Impact Check
SCORING: CVSS from Multiple Sources
CVSS Scores
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| SCORE | VERSION | SEVERITY | VECTOR | SOURCE |
|---|---|---|---|---|
| The sources have not yet published a verified CVSS metric. | ||||
Patch and Remediation Guide
Solution & Remediation Advisory
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Public exploit and active exploitation status
Verified exploit intelligence
No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.
Weakness Classification and Attack Patterns (CWE & CAPEC)
CWE - Common Weakness Enumeration
While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-98854 is associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-98854 weaknesses.
Official Sources and Advisories
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