Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-64062

CVE-2026-64062MEDIUM

Linux Linux — netfs: Fix potential deadlock in write-through mode

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   L   L   L   N  U  N  N  H    5.5   .0013    1.9     —

AFFECTED
  Product  Versions                                    Fixed
  Linux    288ace2f57c9d06dd2e42bd80d03747d879a4068 –  —
  Linux    6.10 –                                      6.12.92

TIMELINE
  Jul 19  Reserved by Linux
  Jul 19  Published (CNA: Linux)
  Sep 2   ENRICHED — CVE-2026-64062 (Linux). Received CVSS 5.5 and CPE data from NVD.

CWE-667 · CNA: Linux · CVSS v3.1 · 4 references · NVD status: Analyzed

Description

In the Linux kernel, the following vulnerability has been resolved: netfs: Fix potential deadlock in write-through mode Fix netfs_advance_writethrough() to always unlock the supplied folio and to mark it dirty if it isn't yet written to the end. Unfortunately, it can't be marked for writeback until the folio is done with as that may cause a deadlock against mmapped reads and writes. Even though it has been marked dirty, premature writeback can't occur as the caller is holding both inode->i_rwsem (which will prevent concurrent truncation, fallocation, DIO and other writes) and ictx->wb_lock (which will cause flushing to wait and writeback to skip or wait). Note that this may be easier to deal with once the queuing of folios is split from the generation of subrequests.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
July 19, 2026	Reserved	Reserved by Linux
July 19, 2026	Published	Published (CNA: Linux)
September 2, 2026	ENRICHED	ENRICHED — CVE-2026-64062 (Linux). Received CVSS 5.5 and CPE data from NVD.

Affected

Affected products and packages — 2 rows
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Linux	Linux	—	288ace2f57c9d06dd2e42bd80d03747d879a4068	—
Linux	Linux	—	6.10	6.12.92

Weaknesses

CWE-667

References (4)

Authoritative record: CVE-2026-64062 at cve.org

Vendors: linux

Weaknesses: CWE-667

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-64062 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.