CVE-2026-90273

Published: Set 17, 2026 Last Modified: Set 17, 2026

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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.

https://git.kernel.org/stable/c/0a47f0be6557b4a851addd430383a4dc7ee08752

https://git.kernel.org/stable/c/7e4f2702bbadbde887a5d8897297720a7f037ee5