---
id: CVE-2025-38322
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  perf/x86/intel: Fix crash in icl_update_topdown_event()

  The perf_fuzzer found a hard-lockup crash on a RaptorLake machine:

    Oops: general protection fault, maybe for…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  perf/x86/intel: Fix crash in icl_update_topdown_event()

  The perf_fuzzer found a hard-lockup crash on a RaptorLake machine:

    Oops: general protection fault, maybe for…
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'
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 6.1.134, < 6.1.149'
  - 'linux_kernel >= 6.6.87, < 6.6.101'
  - 'linux_kernel >= 6.12.23, < 6.12.49'
  - 'linux_kernel >= 6.13.11, < 6.14'
  - 'linux_kernel >= 6.14.2, < 6.15.4'
  - linux_kernel = 6.16
  - debian_linux = 11.0
patched:
  - linux_kernel 6.15.4
published: '2025-07-10'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T02:17:53.807'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-38322'
references:
  - url: 'https://git.kernel.org/stable/c/702ea6028032d6c1fe96c2d4762a3575e3654819'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/79e2dd573116d3338507c311460da9669095c94d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/a85cc69acdcb05f8cd226b8ea0778b8e2e887e6f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/b0823d5fbacb1c551d793cbfe7af24e0d1fa45ed'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/e97c45c770f5e56c784a46c2a96ab968d26b97d9'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-019113.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-032379.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
  - url: 'https://cert-portal.siemens.com/productcert/html/ssa-457936.html'
    label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
tags:
  - nvd
  - cve.org
epss: 0.00197
epssPercentile: 0.09358
ingestedAt: '2026-09-08T15:33:26.997Z'
---

## Overview

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

perf/x86/intel: Fix crash in icl_update_topdown_event()

The perf_fuzzer found a hard-lockup crash on a RaptorLake machine:

  Oops: general protection fault, maybe for address 0xffff89aeceab400: 0000
  CPU: 23 UID: 0 PID: 0 Comm: swapper/23
  Tainted: [W]=WARN
  Hardware name: Dell Inc. Precision 9660/0VJ762
  RIP: 0010:native_read_pmc+0x7/0x40
  Code: cc e8 8d a9 01 00 48 89 03 5b cd cc cc cc cc 0f 1f ...
  RSP: 000:fffb03100273de8 EFLAGS: 00010046
  ....
  Call Trace:
    <TASK>
    icl_update_topdown_event+0x165/0x190
    ? ktime_get+0x38/0xd0
    intel_pmu_read_event+0xf9/0x210
    __perf_event_read+0xf9/0x210

CPUs 16-23 are E-core CPUs that don't support the perf metrics feature.
The icl_update_topdown_event() should not be invoked on these CPUs.

It's a regression of commit:

  f9bdf1f95339 ("perf/x86/intel: Avoid disable PMU if !cpuc->enabled in sample read")

The bug introduced by that commit is that the is_topdown_event() function
is mistakenly used to replace the is_topdown_count() call to check if the
topdown functions for the perf metrics feature should be invoked.

Fix it.

## Affected

- `linux_kernel >= 6.1.134, < 6.1.149`
- `linux_kernel >= 6.6.87, < 6.6.101`
- `linux_kernel >= 6.12.23, < 6.12.49`
- `linux_kernel >= 6.13.11, < 6.14`
- `linux_kernel >= 6.14.2, < 6.15.4`
- `linux_kernel = 6.16`
- `debian_linux = 11.0`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.15.4`