Answer in brief
CVE-2026-98223 records a Unknown severity vulnerability in mm: filemap: retain mapped dropbehind folios. 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 | >=fb7d3bc4149395c1ae99029c852eab6c28fc3c88 <2897601dffe576fcd87a4259102f41f7fb0cbfc8 || >=fb7d3bc4149395c1ae99029c852eab6c28fc3c88 <77c0fade37c80e8aa16ac048a9828249055e3f66 || >=fb7d3bc4149395c1ae99029c852eab6c28fc3c88 <848d2ce2fce15fbdc083fbf9691bfa72911033c4 | 2897601dffe576fcd87a4259102f41f7fb0cbfc8, 77c0fade37c80e8aa16ac048a9828249055e3f66, 848d2ce2fce15fbdc083fbf9691bfa72911033c4 |
| Linux/Linuxgeneric | 6.14 | Not reported |
Published upstream
Oct 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 6, 2026
In the Linux kernel, the following vulnerability has been resolved: mm: filemap: retain mapped dropbehind folios Fault-around can map ready dropbehind folios without going through the normal page-cache lookup that clears dropbehind. A mapping represents a competing cached user, so retain the folio instead of forcibly unmapping it when writeback completes. For a mapped folio, folio_unmap_invalidate() can call unmap_mapping_folio(), which takes i_mmap_rwsem and may sleep. Retaining mapped folios avoids this path when folio_end_dropbehind() runs in non-preemptible task context. Tal was able to trigger a sleeping-in-atomic warning due to this [1]. Unmapped dropbehind folios continue through the existing invalidation path.
Quoted source text, attributed separately from HOL analysis.