CVE-2026-53067
highpriority · track · 31EPSS 0.002 · 7 %ileDEEURUUSEPSS · scored 2026-10-27
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (34)
Products and version ranges known to be affected.
advisories (1)
Vendor and ecosystem advisories describing this.
- WID-SEC-W-2026-2077Linux Kernel: Mehrere SchwachstellenDeutsch2026-06-24csaf · cert_bundDE
Ein entfernter Angreifer kann mehrere Schwachstellen im Linux Kernel ausnutzen, um Sicherheitsvorkehrungen zu umgehen, einen Denial-of-Service-Zustand herbeizuführen und weitere, nicht näher spezifizierte Auswirkungen zu erzielen.
also known as (4)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (10)
External citations — patches, advisories, analysis.
- https://git.kernel.org/stable/c/175717cfc06cab79f84cd037d66dda1b8564cd9ecnnvd
- https://git.kernel.org/stable/c/1cba96c0a795124c3229293ed7b5b5765e66f259cnnvd
- https://git.kernel.org/stable/c/3c25587fbf8797b92090b064a6d239a873e55fb1cnnvd
- https://www.kernel.org/Patchcnnvd
- https://git.kernel.org/stable/c/175717cfc06cab79f84cd037d66dda1b8564cd9eenisa_euvd
- https://git.kernel.org/stable/c/1cba96c0a795124c3229293ed7b5b5765e66f259enisa_euvd
- https://git.kernel.org/stable/c/3c25587fbf8797b92090b064a6d239a873e55fb1enisa_euvd
- https://git.kernel.org/stable/c/175717cfc06cab79f84cd037d66dda1b8564cd9ePatchnvd
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