What is CVE-2026-64068?

CVE-2026-64068 is a Critical severity Linux kernel vulnerability with a CVSS score of 9.8 out of 10, classified as a Improper Locking flaw (CWE-667), affecting Linux kernel versions from 6.10 onward and patched in 6.18.50, 7.0.11 and 7.1. CVE-2026-64068 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-64068?

CVE-2026-64068 has a CVSS score of 9.8 out of 10, rated Critical severity. The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2026-64068?

Yes, CVE-2026-64068 has been patched. Fixed versions include 6.18.50, 7.0.11 and 7.1. If you are running Linux kernel 6.10 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-64068 actively exploited?

CVE-2026-64068 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Improper Locking (CWE-667)?

The product does not properly acquire or release a lock, which can lead to unexpected behaviour. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/667.html

CVE-2026-64068

Critical

In the Linux kernel, the following vulnerability has been resolved: netfs: Fix missing locking around retry adding new subreqs Fix netfs_retry_read_subrequests() and netfs_retry_write_stream() to take the appropriate lock when adding extra subrequests into stream->subrequests.

Package Linux Kernel

Published 2026-07-19

Last modified 2026-09-07

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

9.8

out of 10

Critical

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Weakness type

CWE-667

CVE-2026-64068 is a Improper Locking vulnerability

What is Improper Locking?

The product does not properly acquire or release a lock, which can lead to unexpected behaviour. Learn more on MITRE CWE

Affected versions

Linux kernel versions 6.10 and later are affected. Fixed in 6.18.50, 7.0.11, 7.1 and their respective stable series.

Affected from

≥ 6.10

Fixed in

✓ 6.18.50 6.18.x ✓ 7.0.11 7.0.x ✓ 7.1

References

3 total

Kernel Git
https://git.kernel.org/stable/c/393f3f0d7353a94b1e0bc4ca89c683fe983e5fd2

Patch
Kernel Git
https://git.kernel.org/stable/c/cce18c263e9623872327ba3c956012f73c1179cc

Patch
Kernel Git
https://git.kernel.org/stable/c/d5c9d19b0ff2f7153532ac238a5e96fed2df315c

Details

CVE ID CVE-2026-64068

Severity Critical

CVSS score 9.8 / 10

CVSS version 3.1

Published 2026-07-19

Modified 2026-09-07

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-64068?

CVE-2026-64068 is a Critical severity Linux kernel vulnerability with a CVSS score of 9.8 out of 10 , classified as an Improper Locking flaw (CWE-667) . It affects Linux kernel versions from 6.10 onward and has been patched in 6.18.50, 7.0.11 and 7.1. CVE-2026-64068 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-64068?

CVE-2026-64068 has a CVSS score of 9.8 out of 10, rated Critical severity (CVSS 3.1). The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2026-64068?

Yes. CVE-2026-64068 has been patched. Fixed versions include 6.18.50, 7.0.11 and 7.1. If you are running Linux kernel 6.10 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-64068 actively exploited?

No. CVE-2026-64068 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.