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CVE-2026-98964: nvmet: use the local P2P device on metadata allocation failure

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-23 · updated 2026-10-30

Description

In the Linux kernel, the following vulnerability has been resolved: nvmet: use the local P2P device on metadata allocation failure nvmet_req_alloc_p2pmem_sgls() assigns req->p2p_dev only after the data and metadata SGL allocations succeed. If the data allocation succeeds but the metadata allocation fails, out_free_sg passes req->p2p_dev to pci_p2pmem_free_sgl() before that assignment has taken place. Pass the local p2p_dev argument instead, so cleanup uses the same PCI device as the successful data allocation.

Affected products

• Linux: from 5.10.43 before 5.10.273; from 5.12.10 before 5.13 — fixed in 5.10.273, 5.13

How to fix

Upgrade to a fixed version: Linux 5.10.273, 5.13. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/32f21607911a1f69c8f0f93a6c28fe6f8490aa98
• https://git.kernel.org/stable/c/3c231142c4f4bb96836469eb276026ec55940093
• https://git.kernel.org/stable/c/48c8b59429d09a7c3598de425acbc2d3f4e6647b
• https://git.kernel.org/stable/c/4aa9c0f377a4de5e8fddce76b34ee4529639a1ff
• https://git.kernel.org/stable/c/73bf0f9579633b531098a475e6e55c9316763aed
• https://git.kernel.org/stable/c/ce79a6c5cc1b8054ec8d3eba16adda4a36113438
• https://git.kernel.org/stable/c/e8f24ae4f45efe6861f801c6ebd2789c9016f1bc
• https://git.kernel.org/stable/c/eb72e2eeff559eb1eb07b1d644ce2bc1a16c4a80

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