PT-2026-51961 · Linux · Linux

Publicado 2026-06-24 · Atualizado 2026-06-24 · CVE-2026-53067

Mitre

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.

Identificadores relacionados

CVE-2026-53067

Produtos afetados

Linux

Referências · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-53067 · Nota de Segurança
• https://git.kernel.org/stable/c/3c25587fbf8797b92090b064a6d239a873e55fb1 · Nota
• https://git.kernel.org/stable/c/1cba96c0a795124c3229293ed7b5b5765e66f259 · Nota
• https://git.kernel.org/stable/c/175717cfc06cab79f84cd037d66dda1b8564cd9e · Nota