What’s Vulnerable › Vulnerabilities

CVE-2026-93092: firmware: arm_scmi: Unregister device notifier before IDR teardown

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-17 · updated 2026-10-30

Description

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.

Affected products

• Linux: 6.3 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/3ec1f79e912fa0e1c119753c819eb3c2591e71b7
• https://git.kernel.org/stable/c/492fb49eac24beecd6d3c5e4744a513e626f8dcf
• https://git.kernel.org/stable/c/66a0bbf30cc14140fe13f63cd594a7c1ee352b75
• https://git.kernel.org/stable/c/70a26b37389846f1f29a09f7983aa3f45feff529
• https://git.kernel.org/stable/c/74fcaa0a3f7ad3edfde2e8c6cb8ae457a00e0b7a
• https://git.kernel.org/stable/c/f5e528f631425416f9b39e9d8b385c9f1ceb40d6

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