What is CVE-2026-64178?

CVE-2026-64178 is a High severity Linux kernel vulnerability with a CVSS score of 8.8 out of 10, classified as a Use After Free flaw (CWE-416), affecting Linux kernel versions from 2.6.12 onward and patched in 5.10.258, 5.15.209, 6.1.175 and others. CVE-2026-64178 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-64178?

CVE-2026-64178 has a CVSS score of 8.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2026-64178?

Yes, CVE-2026-64178 has been patched. Fixed versions include 5.10.258, 5.15.209, 6.1.175 and others. If you are running Linux kernel 2.6.12 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-64178 actively exploited?

CVE-2026-64178 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Use After Free (CWE-416)?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/416.html

CVE-2026-64178

High

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: bnep: Fix UAF read of dev->name bnep_add_connection() needs to keep holding the bnep_session_sem while reading dev->name (just like bnep_get_connlist() does); otherwise the bnep_session() thread can concurrently free the net_device, which can for example be triggered by a concurrent bnep_del_connection(). (This UAF is fairly uninteresting from a security perspective; calling bnep_add_connection() requires passing a capable(CAP_NET_ADMIN) check. It also requires completely tearing down a netdev during a fairly tight race window.)

Package Linux Kernel

Published 2026-07-19

Last modified 2026-08-12

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

8.8

out of 10

High

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Weakness type

CWE-416

CVE-2026-64178 is a Use After Free vulnerability

What is Use After Free?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. Learn more on MITRE CWE

Affected versions

Linux kernel versions 2.6.12 and later are affected. Fixed in 5.10.258, 5.15.209, 6.1.175, 6.6.142, 6.12.92, 6.18.34, 7.0.11, 7.1 and their respective stable series.

Affected from

≥ 2.6.12

Fixed in

✓ 5.10.258 5.10.x ✓ 5.15.209 5.15.x ✓ 6.1.175 6.1.x ✓ 6.6.142 6.6.x ✓ 6.12.92 6.12.x ✓ 6.18.34 6.18.x ✓ 7.0.11 7.0.x ✓ 7.1

References

8 total

Kernel Git
https://git.kernel.org/stable/c/4907596f25b1720fa948371ac5f6c1f8da10a5bc

Patch
Kernel Git
https://git.kernel.org/stable/c/5506aec795135cdd4cbf4e845929155663b25055

Patch
Kernel Git
https://git.kernel.org/stable/c/59e932ded949fa6f0340bf7c6d7818f962fa4fd2

Patch
Kernel Git
https://git.kernel.org/stable/c/915a92182e2cda9cd7d2479020a44c6eda986f7c

Patch
Kernel Git
https://git.kernel.org/stable/c/a75bbcb10cb21acc169b785e9804f57d97873a9c

Patch

Showing 5 of 8 references View all on NVD

Details

CVE ID CVE-2026-64178

Severity High

CVSS score 8.8 / 10

CVSS version 3.1

Published 2026-07-19

Modified 2026-08-12

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-64178?

CVE-2026-64178 is a High severity Linux kernel vulnerability with a CVSS score of 8.8 out of 10 , classified as an Use After Free flaw (CWE-416) . It affects Linux kernel versions from 2.6.12 onward and has been patched in 5.10.258, 5.15.209, 6.1.175 and others. CVE-2026-64178 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-64178?

CVE-2026-64178 has a CVSS score of 8.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2026-64178?

Yes. CVE-2026-64178 has been patched. Fixed versions include 5.10.258, 5.15.209, 6.1.175 and others. If you are running Linux kernel 2.6.12 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-64178 actively exploited?

No. CVE-2026-64178 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.