CVE-2026-93092 PUBLISHED

firmware: arm_scmi: Unregister device notifier before IDR teardown

Assigner: Linux
Reserved: 17.09.2026 Published: 17.09.2026 Updated: 17.09.2026

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

firmware: arm_scmi: Unregister device notifier before IDR teardown

The requested-devices notifier looks up protocol fwnodes from the active_protocols IDR. During remove, unregister the notifier before releasing and destroying active_protocols so no notifier callback can race with the IDR teardown.

Keep the bus notifier registered until after the protocol state is torn down, matching the existing remove ordering for SCMI bus users.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from 53b8c25df7082edd78a3fc63e359abee0f28fa70 to 70a26b37389846f1f29a09f7983aa3f45feff529 (excl.)
  • affected from 53b8c25df7082edd78a3fc63e359abee0f28fa70 to 492fb49eac24beecd6d3c5e4744a513e626f8dcf (excl.)
  • affected from 53b8c25df7082edd78a3fc63e359abee0f28fa70 to f5e528f631425416f9b39e9d8b385c9f1ceb40d6 (excl.)
  • affected from 53b8c25df7082edd78a3fc63e359abee0f28fa70 to 74fcaa0a3f7ad3edfde2e8c6cb8ae457a00e0b7a (excl.)
  • affected from 53b8c25df7082edd78a3fc63e359abee0f28fa70 to 66a0bbf30cc14140fe13f63cd594a7c1ee352b75 (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 6.3 is affected
  • unaffected from 0 to 6.3 (excl.)
  • unaffected from 6.6.157 to 6.6.* (incl.)
  • unaffected from 6.12.110 to 6.12.* (incl.)
  • unaffected from 6.18.52 to 6.18.* (incl.)
  • unaffected from 7.2.6 to 7.2.* (incl.)
  • unaffected from 7.3-rc1 to * (incl.)

References