---
id: CVE-2026-90273
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  coresight: etm4x: missing cscfg_csdev_disable_active_config() in perf enable

  In the perf enable path, there are missing cases where
  cscfg_csdev_disable_active_config()…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  coresight: etm4x: missing cscfg_csdev_disable_active_config() in perf enable

  In the perf enable path, there are missing cases where
  cscfg_csdev_disable_active_config()…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 810ac401db1fe432020d7936a199591000de8279 <
    7e4f2702bbadbde887a5d8897297720a7f037ee5
  - >-
    Linux >= 810ac401db1fe432020d7936a199591000de8279 <
    0a47f0be6557b4a851addd430383a4dc7ee08752
  - Linux 5.15
published: '2026-09-17'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T17:17:23.883'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90273'
references:
  - url: 'https://git.kernel.org/stable/c/0a47f0be6557b4a851addd430383a4dc7ee08752'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/7e4f2702bbadbde887a5d8897297720a7f037ee5'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-17T16:21:47.837Z'
epss: 0.00198
epssPercentile: 0.08487
---

## Overview

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

coresight: etm4x: missing cscfg_csdev_disable_active_config() in perf enable

In the perf enable path, there are missing cases where
cscfg_csdev_disable_active_config() is not called:

  - Branch broadcast is selected but not supported by the hardware
  - etm4_enable_hw() fails

This can lead to a leak of config_desc->active_cnt.
Fix this by properly calling cscfg_csdev_disable_active_config()
in these error paths.

## Remediation

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