---
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: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-772
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 810ac401db1fe432020d7936a199591000de8279 <
    7e4f2702bbadbde887a5d8897297720a7f037ee5
  - >-
    Linux >= 810ac401db1fe432020d7936a199591000de8279 <
    0a47f0be6557b4a851addd430383a4dc7ee08752
  - Linux 5.15
published: '2026-09-17'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T11:18:00.173'
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
  - url: 'https://git.kernel.org/stable/c/d5f3dae82705d9388434892915008da3bb83c4ba'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90273.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-90273'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2536322'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-90273'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90273'
  - url: >-
      https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-90273.mbox
  - url: 'https://git.kernel.org/stable/c/ba63c62d4252f6bc58fd2a567075c72d03332562'
  - url: 'https://git.kernel.org/stable/c/26f9e89bad5a7e3005d3dc97a2e2fa6d6b2b8bb6'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00209
epssPercentile: 0.10957
cvssSource: vendor
ingestedAt: '2026-09-17T16:21:47.837Z'
---

## 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.

## Vendor advisories

- **Red Hat VEX** · Moderate · updated 2026-10-05 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90273.json)