What is CVE-2026-53364?

CVE-2026-53364 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a Memory Leak flaw (CWE-401), affecting Linux kernel versions from 6.16.4 onward and patched in 6.18.35, 7.0.12 and 7.1. CVE-2026-53364 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-53364?

CVE-2026-53364 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-2026-53364?

Yes, CVE-2026-53364 has been patched. Fixed versions include 6.18.35, 7.0.12 and 7.1. If you are running Linux kernel 6.16.4 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-53364 actively exploited?

CVE-2026-53364 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Memory Leak (CWE-401)?

The product does not release memory after use, causing gradual resource exhaustion. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/401.html

CVE-2026-53364

Medium

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_conn: Fix memory leak in hci_le_big_terminate() hci_le_big_terminate() allocates iso_list_data via kzalloc_obj but returns 0 without freeing it when neither pa_sync_term nor big_sync_term flags are set after evaluating the PA and BIG sync connection state. This early-return path was introduced when hci_le_big_terminate() was refactored to take struct hci_conn instead of raw u8 parameters, adding PA/BIG flag evaluation logic. The existing kfree() on hci_cmd_sync_queue failure does not cover this path.

Package Linux Kernel

Published 2026-07-13

Last modified 2026-08-03

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-401

CVE-2026-53364 is a Memory Leak vulnerability

What is Memory Leak?

The product does not release memory after use, causing gradual resource exhaustion. Learn more on MITRE CWE

Affected versions

Linux kernel versions 6.16.4, 6.17 and later are affected. Fixed in 6.18.35, 7.0.12, 7.1 and their respective stable series.

Affected from

≥ 6.16.4 ≥ 6.17

Fixed in

✓ 6.18.35 6.18.x ✓ 7.0.12 7.0.x ✓ 7.1

References

4 total

Kernel Git
https://git.kernel.org/stable/c/a59d4f4217e6200ca9180643e5738a87d3fa8be0

Patch
Kernel Git
https://git.kernel.org/stable/c/bfa9d28960ed677d556bdf097073bc3129686229

Patch
Kernel Git
https://git.kernel.org/stable/c/e6b78019664dfe37c3dc707f50e7b453d6c7726d

Patch
Kernel Git
https://git.kernel.org/stable/c/488e808e3fa53200f3ef3324c45fcba4ae9f4972

Details

CVE ID CVE-2026-53364

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2026-07-13

Modified 2026-08-03

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-53364?

CVE-2026-53364 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as a Memory Leak flaw (CWE-401) . It affects Linux kernel versions from 6.16.4 onward and has been patched in 6.18.35, 7.0.12 and 7.1. CVE-2026-53364 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-53364?

CVE-2026-53364 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-2026-53364?

Yes. CVE-2026-53364 has been patched. Fixed versions include 6.18.35, 7.0.12 and 7.1. If you are running Linux kernel 6.16.4 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-53364 actively exploited?

No. CVE-2026-53364 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.