Secuno
ENNL
Book demo

CVE-2026-64066

Linux Kernel out-of-bounds read

9.8 CRITICALEPSS 0.65%
  1. Published19 Jul 2026

Description

In the Linux kernel, the following vulnerability has been resolved: netfs: Fix netfs_read_to_pagecache() to pause on subreq failure Fix netfs_read_to_pagecache() so that it pauses the generation of new subrequests if an already-issued subrequest fails.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Linux Kernel≥ 6.12 < 6.18.34 · ≥ 6.19 < 7.0.11 · 7.1

Remediation

Fixed in
Linux Kernel≥ 6.18.34

References

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

CVE-2026-1078378.2
RIOT is an open-source microcontroller operating system designed for Internet of Things…
CVE-2026-78269.1
A heap-based out-of-bounds read in the BufferSerializerIOv2_ReadBuffer function…
CVE-2026-823348.1
IBM Guardium Data Protection 12.0, 12.1, 12.2 is vulnerable to a heap-based…
CVE-2026-144968.2
IBM DataPower Gateway 10.5.0.0 through 10.5.0.22, 10.6.1 through 10.6.6, 10.6.0.0…
CVE-2026-764578.6
As part of Cisco's ongoing commitment to proactive security and product quality, the…
CVE-2026-772148.2
libexpat before commit 13c5f63 contains a heap buffer over-read vulnerability in…

Frequently asked

Is CVE-2026-64066 being actively exploited?

CVE-2026-64066 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.65%.

How severe is CVE-2026-64066?

CVE-2026-64066 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.65% probability of exploitation.

Which products are affected by CVE-2026-64066?

Affected products include Linux Kernel.

How do I fix CVE-2026-64066?

Upgrade affected software to a fixed version, for example Linux Kernel 6.18.34 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-64066 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

See how prioritisation worksBook a demo

Get Patch this first every Monday

Five vulnerabilities that matter this week, ranked on real exploitation. Plain language, one email, no spam.

You can unsubscribe with one click from every issue. We handle your details as described in our privacy policy.

Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.