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CVE-2026-72329: net/liquidio: drop cached VF pci_dev LUT

• Severity: critical (CVSS 9.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-15 · updated 2026-10-30

Description

In the Linux kernel, the following vulnerability has been resolved: net/liquidio: drop cached VF pci_dev LUT The PF SR-IOV enable path caches VF pci_dev pointers in dpiring_to_vfpcidev_lut[] by iterating with pci_get_device(). Those entries do not own a reference, because the iterator drops the previous device reference on each step. The cached pointer is then dereferenced later when handling OCTEON_VF_FLR_REQUEST. Replace the cached VF mapping with runtime lookup on the mailbox DPI ring: derive the VF index from q_no, resolve the VF via exported PCI IOV helpers, validate it with the PF pointer and VF ID, then issue pcie_flr() and drop the reference with pci_dev_put(). Remove the unused VF lookup table initialization and cleanup.

Affected products

• Linux: 4.10 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/08ff33dce6f91510bb296a753a232db0ca3fd3d8
• https://git.kernel.org/stable/c/1cf5c6a80adc31456f3e93b2922a2446fd63e2c4
• https://git.kernel.org/stable/c/4ec87796fadf5a631ee6513c258c0e3d9ca62f79
• https://git.kernel.org/stable/c/5c0e3ba4f500fd4314ceb42f07f16bc445156431
• https://git.kernel.org/stable/c/81acef3a247fd523513a2e9f71de1c167bc0f882
• https://git.kernel.org/stable/c/e3b20de8d7c06c8f1a0ded1e52be9d282609c3da

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