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.

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Linux Linux unaffected
Version Status Constraints
1c3b002c6bf684b445a7107609979bca5f21bc03 affected < 175717cfc06cab79f84cd037d66dda1b8564cd9e
1c3b002c6bf684b445a7107609979bca5f21bc03 affected < 3c25587fbf8797b92090b064a6d239a873e55fb1
1c3b002c6bf684b445a7107609979bca5f21bc03 affected < 1cba96c0a795124c3229293ed7b5b5765e66f259
Linux Linux affected
Version Status Constraints
6.17 affected —
0 unaffected < 6.17
6.18.33 unaffected ≤ 6.18.*
7.0.10 unaffected ≤ 7.0.*
7.1 unaffected ≤ *

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Workaround

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References
Link Providers
https://git.kernel.org/stable/c/175717cfc06cab79f84cd037d66dda1b8564cd9e cve-icon
https://git.kernel.org/stable/c/1cba96c0a795124c3229293ed7b5b5765e66f259 cve-icon
https://git.kernel.org/stable/c/3c25587fbf8797b92090b064a6d239a873e55fb1 cve-icon
History

Wed, 24 Jun 2026 17:15:00 +0000

Type Values Removed Values Added
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.
Title PCI: endpoint: pci-ep-msi: Fix error unwind and prevent double alloc
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-06-24T16:30:09.492Z

Reserved: 2026-06-09T07:44:35.382Z

Link: CVE-2026-53067

cve-icon Vulnrichment

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cve-icon NVD

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cve-icon Redhat

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cve-icon OpenCVE Enrichment

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Weaknesses

No weakness.