CVE-2026-90273

kernel: coresight: etm4x: missing cscfg_csdev_disable_active_config() in perf enable

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Severity

Moderate

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · September 17, 2026

Updated · October 6, 2026

Description

A flaw was found in the Coresight ETM4x component of the Linux kernel. This vulnerability occurs in the performance (perf) enable path due to missing calls to cscfg_csdev_disable_active_config() when branch broadcast is unsupported or hardware enablement fails. This oversight can lead to a leak of config_desc->active_cnt, potentially resulting in a denial of service (DoS) condition.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-772 · Missing Release of Resource after Effective Lifetime