7.8

CVE-2026-53067

PCI: endpoint: pci-ep-msi: Fix error unwind and prevent double alloc

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 6.17 < 6.18.33
Linux ≫ Linux Kernel Version >= 6.19 < 7.0.10
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EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.12% 0.02
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
NIST 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-415 Double Free

The product calls free() twice on the same memory address.

https://git.kernel.org/stable/c/175717cfc06cab79f84cd037d66dda1b8564cd9e
Patch
https://git.kernel.org/stable/c/3c25587fbf8797b92090b064a6d239a873e55fb1
Patch
https://git.kernel.org/stable/c/1cba96c0a795124c3229293ed7b5b5765e66f259
Patch