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CVE-2026-53067

7.8 · 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 mes…

Published Jun 24, 2026CWE-415EPSS 0.17%

Overview

CVE-2026-53067 is a high-severity vulnerability. It was published on June 24, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/175717cfc06cab79f84cd037d66dda1b8564cd9eRefgit.kernel.org/stable/c/1cba96c0a795124c3229293ed7b5b5765e66f259Refgit.kernel.org/stable/c/3c25587fbf8797b92090b064a6d239a873e55fb1

How CyberStrike helps

Frequently asked questions

What is CVE-2026-53067?

CVE-2026-53067 is a high-severity vulnerability. It was published on June 24, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-53067?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-53067?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-53067?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-53067 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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