Answer in brief
CVE-2026-98854 records a Unknown severity vulnerability in of/overlay: only treat a positive changeset id as registered. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), 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.
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.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=61b4de4e0b384f4a22c55c3bada604da49cec4e1 <c08a54df9d33dcd6ff089adc9434b2c008af3a39 || >=61b4de4e0b384f4a22c55c3bada604da49cec4e1 <0d1525fdcd3355672b7485d61e55df6824ab5ad1 || >=61b4de4e0b384f4a22c55c3bada604da49cec4e1 <c875407c34dadaef0599834ad9c815f4c9f50d15 || >=61b4de4e0b384f4a22c55c3bada604da49cec4e1 <44081d708b5b885487bac792db78324b7b4c267d | c08a54df9d33dcd6ff089adc9434b2c008af3a39, 0d1525fdcd3355672b7485d61e55df6824ab5ad1, c875407c34dadaef0599834ad9c815f4c9f50d15, 44081d708b5b885487bac792db78324b7b4c267d |
| Linux/Linuxgeneric | 4.15 | Not reported |
| Linux/Linuxgeneric | >=61b4de4e0b384f4a22c55c3bada604da49cec4e1 <cc688475c56d34a2b584141f9544cbe23360080d || >=61b4de4e0b384f4a22c55c3bada604da49cec4e1 <c08a54df9d33dcd6ff089adc9434b2c008af3a39 || >=61b4de4e0b384f4a22c55c3bada604da49cec4e1 <0d1525fdcd3355672b7485d61e55df6824ab5ad1 || >=61b4de4e0b384f4a22c55c3bada604da49cec4e1 <c875407c34dadaef0599834ad9c815f4c9f50d15 || >=61b4de4e0b384f4a22c55c3bada604da49cec4e1 <44081d708b5b885487bac792db78324b7b4c267d | cc688475c56d34a2b584141f9544cbe23360080d, c08a54df9d33dcd6ff089adc9434b2c008af3a39, 0d1525fdcd3355672b7485d61e55df6824ab5ad1, c875407c34dadaef0599834ad9c815f4c9f50d15, 44081d708b5b885487bac792db78324b7b4c267d |
Published upstream
Oct 18, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 21, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 18, 2026
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.
Quoted source text, attributed separately from HOL analysis.