# CVE-2025-38322

## Summary

- **CVE ID:** CVE-2025-38322
- **Severity:** MEDIUM
- **CVSS Score:** 5.5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
- **CWE:** N/A
- **Published:** Jul 10, 2025
- **Last Modified:** Sep 8, 2026

## Description

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 Products

- Linux — Linux (781b2db0eb7731fbde510c268b7ccc62959c3feb)
- Linux — Linux (e7f6922c8a5b41522a8329ea6bbf815993b2dd28)
- Linux — Linux (3a8bec6583e5239de3bd597ab382dc6c2b0c29a1)
- Linux — Linux (f9bdf1f953392c9edd69a7f884f78c0390127029)
- Linux — Linux (06cd7bfbb86e9db3e9013ea6636ad2c6f0a1664d)
- Linux — Linux (d8370aa704bd7e384918c8f466856374725c0585)
- Linux — Linux (6.15)
- Linux — Linux (0)
- Linux — Linux (6.1.149)
- Linux — Linux (6.6.101)
- Linux — Linux (6.12.49)
- Linux — Linux (6.15.4)
- Linux — Linux (6.16)
- Linux — Linux (6.1.134)
- Linux — Linux (6.6.87)
- Linux — Linux (6.12.23)
- Linux — Linux (6.13.11)
- Linux — Linux (6.14.2)

## References

- [CNA](https://git.kernel.org/stable/c/702ea6028032d6c1fe96c2d4762a3575e3654819)
- [CNA](https://git.kernel.org/stable/c/79e2dd573116d3338507c311460da9669095c94d)
- [CNA](https://git.kernel.org/stable/c/e97c45c770f5e56c784a46c2a96ab968d26b97d9)
- [CNA](https://git.kernel.org/stable/c/a85cc69acdcb05f8cd226b8ea0778b8e2e887e6f)
- [CNA](https://git.kernel.org/stable/c/b0823d5fbacb1c551d793cbfe7af24e0d1fa45ed)
- [CVE](https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html)
- [siemens-SADP](https://cert-portal.siemens.com/productcert/html/ssa-032379.html)
- [siemens-SADP](https://cert-portal.siemens.com/productcert/html/ssa-019113.html)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.17%
- **EPSS Percentile:** 6.1

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._