---
id: CVE-2026-98814
title: 'nvme: fix command effects log lifetime for multipath heads'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  nvme: fix command effects log lifetime for multipath heads

  KASAN reported a use-after-free when an I/O passthrough command was sent
  through a multipath namespace head …
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= be93e87e780253780df9bb6ecc9bc1199b0d94c3 <
    351d1c47e45b2b35780d0548b1012d7242ba298d
  - >-
    Linux >= be93e87e780253780df9bb6ecc9bc1199b0d94c3 <
    72ece656abd4de8645a421fb482d7a11e6533a45
  - Linux 5.9
published: '2026-10-18'
updated: '2026-10-18'
sourceUpdated: '2026-10-18T15:49:01.538Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-98814'
references:
  - url: 'https://git.kernel.org/stable/c/351d1c47e45b2b35780d0548b1012d7242ba298d'
  - url: 'https://git.kernel.org/stable/c/72ece656abd4de8645a421fb482d7a11e6533a45'
tags:
  - cve.org
ingestedAt: '2026-10-18T16:47:32.477Z'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

nvme: fix command effects log lifetime for multipath heads

KASAN reported a use-after-free when an I/O passthrough command was sent
through a multipath namespace head after the controller path that first
created the head had been removed:

  BUG: KASAN: slab-use-after-free in nvme_command_effects+0x192/0x200 [nvme_core]
  Read of size 4 at addr ffff888141b14400 by task nvme/19811
  nvme_command_effects+0x192/0x200 [nvme_core]
  nvme_cmd_allowed+0x7e/0x1b0 [nvme_core]
  nvme_user_cmd.constprop.0+0x1b5/0x450 [nvme_core]
  nvme_ns_head_chr_ioctl+0xf4/0x2a0 [nvme_core]

Move the log cache to the subsystem, with one entry per command set. Both
controllers and namespace heads hold subsystem references, keeping their
log pointers valid until subsystem release.

## Affected

- `Linux >= be93e87e780253780df9bb6ecc9bc1199b0d94c3 < 351d1c47e45b2b35780d0548b1012d7242ba298d`
- `Linux >= be93e87e780253780df9bb6ecc9bc1199b0d94c3 < 72ece656abd4de8645a421fb482d7a11e6533a45`
- `Linux 5.9`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.