What is CVE-2026-53067?

CVE-2026-53067 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, affecting Linux kernel versions from 6.17 onward and patched in 6.18.33, 7.0.10 and 7.1. CVE-2026-53067 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-53067?

CVE-2026-53067 has a CVSS score of 7.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2026-53067?

Yes, CVE-2026-53067 has been patched. Fixed versions include 6.18.33, 7.0.10 and 7.1. If you are running Linux kernel 6.17 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-53067 actively exploited?

CVE-2026-53067 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-53067

High

In the Linux kernel, the following vulnerability has been resolved: PCI: endpoint: pci-ep-msi: Fix error unwind and prevent double alloc pci_epf_alloc_doorbell() stores the allocated doorbell message array in epf->db_msg/epf->num_db before requesting MSI vectors. If MSI allocation fails, the array is freed but the EPF state may still point to freed memory. Clear epf->db_msg and epf->num_db on the MSI allocation failure path so that later cleanup cannot double-free the array and callers can retry allocation. Also return -EBUSY when doorbells have already been allocated to prevent leaking or overwriting an existing allocation.

Package Linux Kernel

Published 2026-06-24

Last modified 2026-07-21

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.8

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Weakness type

CWE-415

CVE-2026-53067 is classified as CWE-415

See CWE-415 on MITRE CWE for full details on this weakness type.

Affected versions

Linux kernel versions 6.17 and later are affected. Fixed in 6.18.33, 7.0.10, 7.1 and their respective stable series.

Affected from

≥ 6.17

Fixed in

✓ 6.18.33 6.18.x ✓ 7.0.10 7.0.x ✓ 7.1

References

3 total

Kernel Git
https://git.kernel.org/stable/c/175717cfc06cab79f84cd037d66dda1b8564cd9e

Patch
Kernel Git
https://git.kernel.org/stable/c/1cba96c0a795124c3229293ed7b5b5765e66f259

Patch
Kernel Git
https://git.kernel.org/stable/c/3c25587fbf8797b92090b064a6d239a873e55fb1

Patch

Details

CVE ID CVE-2026-53067

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2026-06-24

Modified 2026-07-21

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-53067?

CVE-2026-53067 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 . It affects Linux kernel versions from 6.17 onward and has been patched in 6.18.33, 7.0.10 and 7.1. CVE-2026-53067 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-53067?

CVE-2026-53067 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2026-53067?

Yes. CVE-2026-53067 has been patched. Fixed versions include 6.18.33, 7.0.10 and 7.1. If you are running Linux kernel 6.17 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-53067 actively exploited?

No. CVE-2026-53067 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.