mm/zone_device: do not touch device folio after calling ->folio_free() (CVE-2026-46277) | HOL Guard CVE

High · CVSS 7.8CVE-2026-46277

mm/zone_device: do not touch device folio after calling ->folio_free()

Answer in brief

CVE-2026-46277 records a High severity (CVSS 7.8) vulnerability in mm/zone_device: do not touch device folio after calling ->folio_free(). 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 Jun 8, 2026Updated Aug 5, 2026Source checked Sep 19, 2026First seen by HOL Jul 7, 2026Material review Aug 5, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.8
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 7.8. 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	>=d245f9b4ab806733a77e51a218ca7b8bc3135cd9 <85be0a262e39c706edb53c88af8afde2e98222ba \|\| >=d245f9b4ab806733a77e51a218ca7b8bc3135cd9 <39928984956037cabd304321cb8f342e47421db5	85be0a262e39c706edb53c88af8afde2e98222ba, 39928984956037cabd304321cb8f342e47421db5
Linux/Linuxgeneric	6.19	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 85be0a262e39c706edb53c88af8afde2e98222ba if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Jun 8, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Jul 7, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: mm/zone_device: do not touch device folio after calling ->folio_free() The contents of a device folio can immediately change after calling ->folio_free(), as the folio may be reallocated by a driver with a different order. Instead of touching the folio again to extract the pgmap, use the local stack variable when calling percpu_ref_put_many().

Quoted source text, attributed separately from HOL analysis.