CVE-2026-93089 firmware: arm_scmi: Free transport channel on IDR failure
A memory management error in the Linux kernel SCMI driver can lead to resource leaks or crashes when IDR insertion fails, requiring a kernel patch.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-93089?
CVE-2026-93089 is a memory corruption vulnerability in Linux, published on 17 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
firmware: arm_scmi: 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 chan_free() 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.
Which versions are affected by CVE-2026-93089?
How do I fix CVE-2026-93089?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-93089 being exploited?
There is no known exploitation of CVE-2026-93089 in the wild and no public exploit code.
Sources
Also known as AZL-102548, BELL-CVE-2026-93089, DEBIAN-CVE-2026-93089, GHSA-x7f6-mwmw-m629, UBUNTU-CVE-2026-93089.