CVE-2026-53067 (GCVE-0-2026-53067)

Vulnerability from cvelistv5 – Published: 2026-06-24 16:30 – Updated: 2026-06-24 16:30
VLAI
Title
PCI: endpoint: pci-ep-msi: Fix error unwind and prevent double alloc
Summary
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.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1c3b002c6bf684b445a7107609979bca5f21bc03 , < 175717cfc06cab79f84cd037d66dda1b8564cd9e (git)
Affected: 1c3b002c6bf684b445a7107609979bca5f21bc03 , < 3c25587fbf8797b92090b064a6d239a873e55fb1 (git)
Affected: 1c3b002c6bf684b445a7107609979bca5f21bc03 , < 1cba96c0a795124c3229293ed7b5b5765e66f259 (git)
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Linux Linux Affected: 6.17
Unaffected: 0 , < 6.17 (semver)
Unaffected: 6.18.33 , ≤ 6.18.* (semver)
Unaffected: 7.0.10 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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