coresight: etm4x: missing cscfg_csdev_disable_active_config() in perf enable (CVE-2026-90273) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-90273

coresight: etm4x: missing cscfg_csdev_disable_active_config() in perf enable

Answer in brief

CVE-2026-90273 records a Unknown severity vulnerability in coresight: etm4x: missing cscfg_csdev_disable_active_config() in perf enable. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 17, 2026Updated Sep 17, 2026Source checked Sep 17, 2026First seen by HOL Sep 17, 2026Material review Sep 17, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=810ac401db1fe432020d7936a199591000de8279 <7e4f2702bbadbde887a5d8897297720a7f037ee5 \|\| >=810ac401db1fe432020d7936a199591000de8279 <0a47f0be6557b4a851addd430383a4dc7ee08752	7e4f2702bbadbde887a5d8897297720a7f037ee5, 0a47f0be6557b4a851addd430383a4dc7ee08752
Linux/Linuxgeneric	5.15	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 7e4f2702bbadbde887a5d8897297720a7f037ee5 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 17, 2026

Sources and claim methodology

Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.