What is CVE-2026-64128?

CVE-2026-64128 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a NULL Pointer Dereference flaw (CWE-476), affecting Linux kernel versions from 6.0 onward and patched in 6.1.175, 6.6.142, 6.12.92 and others. CVE-2026-64128 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-64128?

CVE-2026-64128 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2026-64128?

Yes, CVE-2026-64128 has been patched. Fixed versions include 6.1.175, 6.6.142, 6.12.92 and others. If you are running Linux kernel 6.0 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-64128 actively exploited?

CVE-2026-64128 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is NULL Pointer Dereference (CWE-476)?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/476.html

CVE-2026-64128

Medium

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: drop ISO_END frames received without prior ISO_START ISO data PDUs carry a packet-boundary flag indicating START, CONT, END or SINGLE. The ISO_CONT branch of iso_recv() guards against a missing ISO_START by checking conn->rx_len before touching conn->rx_skb, but ISO_END does not. If a peer sends an ISO_END as the first packet on a fresh ISO connection, conn->rx_skb is still NULL and conn->rx_len is zero, so skb_put(conn->rx_skb, ...) dereferences NULL and oopses. For BIS, where receivers sync to a broadcaster without pairing, any broadcaster on the air can trigger this. Mirror the ISO_CONT check at the top of ISO_END so a stray end fragment is logged and dropped instead of crashing the host.

Package Linux Kernel

Published 2026-07-19

Last modified 2026-08-13

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

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

Weakness type

CWE-476

CVE-2026-64128 is a NULL Pointer Dereference vulnerability

What is NULL Pointer Dereference?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. Learn more on MITRE CWE

Affected versions

Linux kernel versions 6.0 and later are affected. Fixed in 6.1.175, 6.6.142, 6.12.92, 6.18.34, 7.0.11, 7.1 and their respective stable series.

Affected from

≥ 6.0

Fixed in

✓ 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

6 total

Kernel Git
https://git.kernel.org/stable/c/1c3d1e1696b72579b970e17999c503a14535205b

Patch
Kernel Git
https://git.kernel.org/stable/c/39f4a82e80c8f5ed2d6952d73fbafc895721a728

Patch
Kernel Git
https://git.kernel.org/stable/c/3af41ee7ebecb0d5c8a504861f6cfad31345310f

Patch
Kernel Git
https://git.kernel.org/stable/c/61f2410a96dee808029e2ae4d6ef2dd635f3477f

Patch
Kernel Git
https://git.kernel.org/stable/c/84c24fb151fc1179355296d7ff29129ac7c42129

Patch

Showing 5 of 6 references View all on NVD

Details

CVE ID CVE-2026-64128

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2026-07-19

Modified 2026-08-13

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-64128?

CVE-2026-64128 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as a NULL Pointer Dereference flaw (CWE-476) . It affects Linux kernel versions from 6.0 onward and has been patched in 6.1.175, 6.6.142, 6.12.92 and others. CVE-2026-64128 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-64128?

CVE-2026-64128 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2026-64128?

Yes. CVE-2026-64128 has been patched. Fixed versions include 6.1.175, 6.6.142, 6.12.92 and others. If you are running Linux kernel 6.0 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-64128 actively exploited?

No. CVE-2026-64128 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.