Answer in brief
CVE-2026-98868 records a Unknown severity vulnerability in dm-pcache: reject a kset that overruns its segment. 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.
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). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 <01a700e9278da5706c865b9ca3ae70fdb7b4531d || >=1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 <96e2863b1f81ea61b8d8d5d5a45d3b4c018f8e10 || >=1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 <7ac1f10f987a2ffae4aecf0e2ceca8f552b665cb | 01a700e9278da5706c865b9ca3ae70fdb7b4531d, 96e2863b1f81ea61b8d8d5d5a45d3b4c018f8e10, 7ac1f10f987a2ffae4aecf0e2ceca8f552b665cb |
| Linux/Linuxgeneric | 6.18 | Not reported |
Published upstream
Oct 18, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 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: dm-pcache: reject a kset that overruns its segment cache_replay(), the writeback worker and the GC worker read a kset of get_kset_onmedia_size() bytes and advance the position by it. A forged key_num makes that size exceed the segment's remaining space, so the advance walks past the segment and trips the cache_pos_advance() BUG_ON. Reject a kset whose on-media size exceeds cache_seg_remain() before use.
Quoted source text, attributed separately from HOL analysis.