CVE-2026-93089: firmware: arm_scmi: Free transport channel on IDR failure
In the Linux kernel, the following vulnerability has been resolved:
firmware: armscmi: Free transport channel on IDR failure
If transport channel setup succeeds but the following IDR insertion fails, the error path destroys the transport device and frees the channel info without invoking the transport cleanup callback.
Call chanfree() before destroying the device so transport specific resources such as IRQs, mailbox channels and mapped shared memory are released consistently with the normal teardown path.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
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debian/linuxto a version that resolves this vulnerability.Fixed in 6.12.111-1 - Upgrade
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debian/linuxto a version that resolves this vulnerability.Fixed in 7.2.6-1 - Upgrade
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debian/linux-6.12to a version that resolves this vulnerability.Fixed in 6.12.111-1~deb12u1 - Upgrade
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linux/Kernelto a version that resolves this vulnerability.Fixed in 6.6.157 - Upgrade
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linux/Kernelto a version that resolves this vulnerability.Fixed in 6.12.110 - Upgrade
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linux/Kernelto a version that resolves this vulnerability.Fixed in 6.18.52 - Upgrade
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linux/Kernelto a version that resolves this vulnerability.Fixed in 7.2.6 - Upgrade
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debian/linuxto a version that resolves this vulnerability.Fixed in 6.1.176-1Fixed in 6.1.190-1Fixed in 6.12.115-2Fixed in 7.2.12-1Fixed in 7.2.15-1 - Upgrade
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debian/linux-6.12to a version that resolves this vulnerability.Fixed in 6.12.113-1~deb12u1 - Upgrade
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ubuntu/linux-hwe-7.0to a version that resolves this vulnerability.Fixed in 7.0.0-42.42~24.04.1 - Upgrade
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ubuntu/linux-riscv-7.0to a version that resolves this vulnerability.Fixed in 7.0.0-42.42.1~24.04.1 - Upgrade
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ubuntu/linuxto a version that resolves this vulnerability.Fixed in 7.0.0-42.42 - Upgrade
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ubuntu/linux-awsto a version that resolves this vulnerability.Fixed in 7.0.0-1016.17 - Upgrade
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ubuntu/linux-gcpto a version that resolves this vulnerability.Fixed in 7.0.0-1016.18 - Upgrade
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ubuntu/linux-ibmto a version that resolves this vulnerability.Fixed in 7.0.0-1017.17 - Upgrade
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ubuntu/linux-oem-7.0to a version that resolves this vulnerability.Fixed in 7.0.0-1017.17 - Upgrade
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ubuntu/linux-oracleto a version that resolves this vulnerability.Fixed in 7.0.0-1015.16 - Upgrade
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ubuntu/linux-riscvto a version that resolves this vulnerability.Fixed in 7.0.0-42.42.1 - Compensating control
In firmware: arm_scmi, call chan_free() before destroying the transport device, including the IDR insertion failure path, so transport-specific resources such as IRQs, mailbox channels, and mapped shared memory are released consistently.
Event History
Frequently Asked Questions
Under what condition can the resource leak occur?
It occurs only when SCMI transport channel setup succeeds but insertion of that channel into the IDR subsequently fails. The affected error path can leave transport-specific resources, including IRQs, mailbox channels, and mapped shared memory, unreleased.
What remediation is provided by the fix?
The fix invokes chan_free() before destroying the transport device when IDR insertion fails. This makes the failure path release transport resources consistently with normal channel teardown.