---
id: CVE-2026-64019
title: |-
  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 a…
summary: |-
  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 a…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-401
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 6.17, < 7.0.11'
  - linux_kernel = 7.1
patched:
  - linux_kernel 7.0.11
published: '2026-07-19'
updated: '2026-10-13'
sourceUpdated: '2026-10-13T14:55:33.817'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-64019'
references:
  - url: 'https://git.kernel.org/stable/c/1bf86336e4b6cf40873fda47a7fe191446864937'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e50db059ec8e63bc50b1cc039e2502cb5ea75a70'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.00198
epssPercentile: 0.08866
ingestedAt: '2026-10-13T15:33:40.022Z'
---

## Overview

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

- `linux_kernel >= 6.17, < 7.0.11`
- `linux_kernel = 7.1`

## Remediation

Upgrade past the affected range:

- `linux_kernel 7.0.11`