# CVE-2026-90273: linux: In the Linux kernel, the following vulnerability has been resolved:  coresight: etm4x: missing cscfg_csdev_disable_ac...

CVE-2026-90273 is fixed in linux on 1 platform, first by DEBIAN-CVE-2026-90273, released September 23, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-90273
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0022
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 17, 2026

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 13.5 (trixie) | 6.12.115-2 | [DEBIAN-CVE-2026-90273](https://patchblox.com/security/data/fix/linux/debian-cve-2026-90273.md) | Sep 23, 2026 |
| Linux | linux Debian 14 | 7.2.6-1 | [DEBIAN-CVE-2026-90273](https://patchblox.com/security/data/fix/linux/debian-cve-2026-90273.md) | Sep 23, 2026 |

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Data as of 2026-11-08T19:12:23Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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