CVE-2026-90273 in Linux
Summary
by MITRE • 09/17/2026
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.
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