CVE-2025-38132

Summary

In the Linux kernel, the following vulnerability has been resolved:

coresight: holding cscfg_csdev_lock while removing cscfg from csdev

There'll be possible race scenario for coresight config:

CPU0 CPU1 (perf enable) load module cscfg_load_config_sets() activate config. // sysfs (sys_active_cnt == 1) … cscfg_csdev_enable_active_config() lock(csdev->cscfg_csdev_lock) deactivate config // sysfs (sys_activec_cnt == 0) cscfg_unload_config_sets() <iterating config_csdev_list> cscfg_remove_owned_csdev_configs() // here load config activate by CPU1 unlock(csdev->cscfg_csdev_lock)

iterating config_csdev_list could be raced with config_csdev_list's entry delete.

To resolve this race , hold csdev->cscfg_csdev_lock() while cscfg_remove_owned_csdev_configs()

Affected Software

Weaknesses

References

• https://git.kernel.org/stable/c/42f8afb0b161631fd1d814d017f75f955475ad41
• https://git.kernel.org/stable/c/53b9e2659719b04f5ba7593f2af0f2335f75e94a

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