---
id: CVE-2026-81015
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  platform/x86/amd/pmc: Fix LPS0 and debugfs leaks when STB init fails

  amd_pmc_probe() registers the LPS0 s2idle handler with
  acpi_register_lps0_dev() and creates the dr…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  platform/x86/amd/pmc: Fix LPS0 and debugfs leaks when STB init fails

  amd_pmc_probe() registers the LPS0 s2idle handler with
  acpi_register_lps0_dev() and creates the dr…
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-459
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 49de59f69a76f538bfa5d0638a8c98d052546567 <
    d201c09c2428a4a8fd3bdcb032ae99f1e016458c
  - >-
    Linux >= 83ad6974dd3bf34c080b3c08d36d02ebc3bd6da8 <
    bc9aa5fe21c3966c80647ed6574b94b863f23c62
  - >-
    Linux >= 83ad6974dd3bf34c080b3c08d36d02ebc3bd6da8 <
    30e5f4d0cd0be655c800f10ae3e530391aa6c1b5
  - >-
    Linux >= 83ad6974dd3bf34c080b3c08d36d02ebc3bd6da8 <
    76f650a76d6a36a4bee79d94db90a0e935a95477
  - Linux 6.14
published: '2026-09-11'
updated: '2026-10-03'
sourceUpdated: '2026-10-03T11:17:41.570'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-81015'
references:
  - url: 'https://git.kernel.org/stable/c/30e5f4d0cd0be655c800f10ae3e530391aa6c1b5'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/76f650a76d6a36a4bee79d94db90a0e935a95477'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/bc9aa5fe21c3966c80647ed6574b94b863f23c62'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/d201c09c2428a4a8fd3bdcb032ae99f1e016458c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-81015.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-81015'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2532225'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-81015'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-81015'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-81015.mbox
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00175
epssPercentile: 0.06963
scores:
  nvd: 7.8
  vendor: 7
  cna: 7.8
ingestedAt: '2026-09-14T15:23:07.475Z'
---

## Overview

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

platform/x86/amd/pmc: Fix LPS0 and debugfs leaks when STB init fails

amd_pmc_probe() registers the LPS0 s2idle handler with
acpi_register_lps0_dev() and creates the driver's debugfs directory before
calling amd_stb_s2d_init(), which is the last step in probe that can fail.

When amd_stb_s2d_init() fails (for example the S2D telemetry region cannot
be ioremapped on a long-running system, or the SMU rejects the S2D setup)
the error path only calls pci_dev_put() and returns.  This leaves
amd_pmc_s2idle_dev_ops on the global lps0_s2idle_devops_head list and leaks
the debugfs directory, while the devm-managed resources backing the handler
are torn down.

Reloading the module then walks the corrupted list in
acpi_register_lps0_dev() and hits:

  list_add corruption. next->prev should be prev, but was NULL.
  kernel BUG at lib/list_debug.c:29!
   acpi_register_lps0_dev+0x44/0x80
   amd_pmc_probe+0x224/0x380 [amd_pmc]
   platform_probe+0x67/0x90

Even without a reload, the stale registration means the next s2idle
transition calls into torn-down driver state.

Unwind the debugfs directory and the LPS0 registration on the
amd_stb_s2d_init() error path.  acpi_unregister_lps0_dev() is safe to call
unconditionally here: it is guarded on the same conditions as
acpi_register_lps0_dev(), which is exactly what amd_pmc_remove() already
relies on.

## Remediation

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

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-09-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-81015.json)