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NVD / CVE Program· CNA Linux

CVE-2026-64058: netfs: Fix netfs_read_folio() to wait on writeback

Noroxi assessment

Priority: Monitor (action score 31/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.12% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 090a8aa1894b72f5b3fc18dee68d42ad45f4a2c6, b8271cccdd5e43cc8d738afb8b51f6ad05b1cb4b, ded0c6f1606061148c202825f7e53d711f9f84cf.

Low priority for now. Upgrade to Linux Linux 090a8aa1894b72f5b3fc18dee68d42ad45f4a2c6, b8271cccdd5e43cc8d738afb8b51f6ad05b1cb4b, ded0c6f1606061148c202825f7e53d711f9f84cf or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: netfs: Fix netfs_read_folio() to wait on writeback Fix netfs_read_folio() to wait for an ongoing writeback to complete so that it can trust the dirty flag and whatever is attached to folio->private (folio->private may get cleaned up by the collector before it clears the writeback flag).

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
Jul 19, 2026
Updated
Sep 14, 2026
EPSS
0.1% · 2th percentile

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CNA vs NVD score

NVD
—
CNA · Linux
7.8
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel6.12 and later · before 6.18.34
  • linux linux kernel6.19 and later · before 7.0.11
  • linux linux kernel7.1

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 6.12affected
    • ee4cdf7ba857a894ad1650d6ab77669cbbfa329e and later · before 090a8aa1894b72f5b3fc18dee68d42ad45f4a2c6affected · git
    • ee4cdf7ba857a894ad1650d6ab77669cbbfa329e and later · before f17b9121bb99f88188ec9be2db5da1d561f4c01baffected · git
    • ee4cdf7ba857a894ad1650d6ab77669cbbfa329e and later · before b8271cccdd5e43cc8d738afb8b51f6ad05b1cb4baffected · git
    • ee4cdf7ba857a894ad1650d6ab77669cbbfa329e and later · before ded0c6f1606061148c202825f7e53d711f9f84cfaffected · git
    • before 6.12not affected · semver
    • 6.12.110 and later · up to and including 6.12.*not affected · semver
    • 6.18.34 and later · up to and including 6.18.*not affected · semver
    • 7.0.11 and later · up to and including 7.0.*not affected · semver
    • 7.1 and laternot affected · original_commit_for_fix

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linux-6.12before 6.12.111-1~deb12u16.12.111-1~deb12u1
Debian:13linuxbefore 6.12.111-16.12.111-1
Debian:14linuxbefore 7.0.12-17.0.12-1
openSUSE:Leap 16.0dtb-aarch64before 6.12.0-160000.40.16.12.0-160000.40.1
openSUSE:Leap 16.0kernel-64kbbefore 6.12.0-160000.40.16.12.0-160000.40.1
openSUSE:Leap 16.0kernel-azurebefore 6.12.0-160000.40.16.12.0-160000.40.1
openSUSE:Leap 16.0kernel-defaultbefore 6.12.0-160000.40.16.12.0-160000.40.1
openSUSE:Leap 16.0kernel-default-basebefore 6.12.0-160000.40.1.160000.2.296.12.0-160000.40.1.160000.2.29
openSUSE:Leap 16.0kernel-docsbefore 6.12.0-160000.40.16.12.0-160000.40.1
openSUSE:Leap 16.0kernel-kvmsmallbefore 6.12.0-160000.40.16.12.0-160000.40.1
openSUSE:Leap 16.0kernel-obs-buildbefore 6.12.0-160000.40.16.12.0-160000.40.1
openSUSE:Leap 16.0kernel-obs-qabefore 6.12.0-160000.40.16.12.0-160000.40.1
openSUSE:Leap 16.0kernel-rtbefore 6.12.0-160000.40.16.12.0-160000.40.1
openSUSE:Leap 16.0kernel-sourcebefore 6.12.0-160000.40.16.12.0-160000.40.1
openSUSE:Leap 16.0kernel-symsbefore 6.12.0-160000.40.16.12.0-160000.40.1
openSUSE:Leap 16.0kernel-zfcpdumpbefore 6.12.0-160000.40.16.12.0-160000.40.1
SUSE:Linux Enterprise Server 16.0kernel-azurebefore 6.12.0-160000.40.16.12.0-160000.40.1
SUSE:Linux Enterprise Server 16.0kernel-docsbefore 6.12.0-160000.40.16.12.0-160000.40.1
SUSE:Linux Enterprise Server 16.0kernel-kvmsmallbefore 6.12.0-160000.40.16.12.0-160000.40.1
SUSE:Linux Enterprise Server 16.0kernel-obs-qabefore 6.12.0-160000.40.16.12.0-160000.40.1
SUSE:Linux Enterprise Server 16.0kernel-zfcpdumpbefore 6.12.0-160000.40.16.12.0-160000.40.1
SUSE:Linux Micro 6.2kernel-64kbbefore 6.12.0-160000.40.16.12.0-160000.40.1
SUSE:Linux Micro 6.2kernel-defaultbefore 6.12.0-160000.40.16.12.0-160000.40.1
SUSE:Linux Micro 6.2kernel-default-basebefore 6.12.0-160000.40.1.160000.2.296.12.0-160000.40.1.160000.2.29

+4

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2026-64055Jul 19, 2026 · net: ethernet: cortina: Carry over frag counter
    39Monitor
  • ← EarlierCVE-2026-64056Jul 19, 2026 · net: ethernet: cortina: Make RX SKB per-port
    39Monitor
  • Later →CVE-2026-64059Jul 19, 2026 · netfs: Fix folio->private handling in netfs_perform_write()
    22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux090a8aa1894b72f5b3fc18dee68d42ad45f4a2c6Vendor (CNA)
Linux Linuxb8271cccdd5e43cc8d738afb8b51f6ad05b1cb4bVendor (CNA)
Linux Linuxded0c6f1606061148c202825f7e53d711f9f84cfVendor (CNA)
Linux Linuxf17b9121bb99f88188ec9be2db5da1d561f4c01bVendor (CNA)
debian:linux6.12.111-1 · Debian:13Package registry (OSV)
debian:linux-6.126.12.111-1~deb12u1 · Debian:12Package registry (OSV)
opensuse:dtb-aarch646.12.0-160000.40.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-64kb6.12.0-160000.40.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-azure6.12.0-160000.40.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-default6.12.0-160000.40.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-default-base6.12.0-160000.40.1.160000.2.29 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-docs6.12.0-160000.40.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-kvmsmall6.12.0-160000.40.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-obs-build6.12.0-160000.40.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-obs-qa6.12.0-160000.40.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-rt6.12.0-160000.40.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-source6.12.0-160000.40.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:kernel-syms6.12.0-160000.40.1 · openSUSE:Leap 16.0Package registry (OSV)
suse:kernel-64kb6.12.0-160000.40.1 · SUSE:Linux Micro 6.2Package registry (OSV)
suse:kernel-azure6.12.0-160000.40.1 · SUSE:Linux Enterprise Server 16.0Package registry (OSV)
suse:kernel-default6.12.0-160000.40.1 · SUSE:Linux Micro 6.2Package registry (OSV)
suse:kernel-default-base6.12.0-160000.40.1.160000.2.29 · SUSE:Linux Micro 6.2Package registry (OSV)
suse:kernel-docs6.12.0-160000.40.1 · SUSE:Linux Enterprise Server 16.0Package registry (OSV)
suse:kernel-kvmsmall6.12.0-160000.40.1 · SUSE:Linux Enterprise Server 16.0Package registry (OSV)
suse:kernel-obs-build6.12.0-160000.40.1 · SUSE:Linux Micro Extras 6.2Package registry (OSV)
suse:kernel-obs-qa6.12.0-160000.40.1 · SUSE:Linux Enterprise Server 16.0Package registry (OSV)
suse:kernel-rt6.12.0-160000.40.1 · SUSE:Linux Micro 6.2Package registry (OSV)
suse:kernel-source6.12.0-160000.40.1 · SUSE:Linux Micro 6.2Package registry (OSV)
suse:kernel-syms6.12.0-160000.40.1 · SUSE:Linux Micro Extras 6.2Package registry (OSV)
suse:kernel-zfcpdump6.12.0-160000.40.1 · SUSE:Linux Enterprise Server 16.0Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-125 · Out-of-bounds Read

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (3 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records