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CVE-2026-64019: nvme-pci: fix dma mapping leak on data setup error

• Severity: medium (CVSS 5.5 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: 2026-07-19 · updated 2026-10-15
• Weakness: CWE-401

Description

In the Linux kernel, the following vulnerability has been resolved: nvme-pci: fix dma mapping leak on data setup error We're leaking the initial DMA mapping during iteration if we fail to allocate the tracking descriptor for both PRP and SGL. Unmap the iterator directly; we can't use the existing unmap helper because it depends on the tracking descriptor being successfully allocated, so a new one for an in-use iterator is provided. The mappings were also leaking when the driver detects an invalid bio_vec when mapping PRPs, so fix that too.

Affected products

• Linux kernel: from 6.17 before 7.0.11; 7.1-rc1, 7.1-rc2, 7.1-rc3, 7.1-rc4 — fixed in 7.0.11

How to fix

Upgrade to a fixed version: Linux kernel 7.0.11. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/1bf86336e4b6cf40873fda47a7fe191446864937
• https://git.kernel.org/stable/c/e50db059ec8e63bc50b1cc039e2502cb5ea75a70
• https://git.kernel.org/stable/c/fba32257979dda14b0d8ed7402490ae0be44972a

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