CVE-2026-93083

Summary

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

firmware: arm_scmi: Unwind TX receiver mailbox setup failure

mailbox_chan_setup() can request an additional unidirectional TX receiver channel after successfully acquiring the primary channel. If that second request fails, the function returns immediately and leaves the primary channel allocated.

Unwind the primary mailbox channel before returning the error so probe deferral or other setup failures do not leave the channel busy for later probe attempts.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux9f68ff79ec2cb303f360a35eef5dd8f1f0f817e1 < babb017cf5e4600c94c23ea87175a0380235a3eeaffected
LinuxLinux9f68ff79ec2cb303f360a35eef5dd8f1f0f817e1 < 717b8e972a667fc1bebe63cbcf0d58e692cbb491affected
LinuxLinux9f68ff79ec2cb303f360a35eef5dd8f1f0f817e1 < 9958f55eace8b43713c9fc54dcf90e7cdefee413affected
LinuxLinux9f68ff79ec2cb303f360a35eef5dd8f1f0f817e1 < 6f7c06744d53dc8e047725d411d7f915d9ec35aeaffected
LinuxLinux6.4affected
LinuxLinux0 < 6.4unaffected
LinuxLinux6.12.110 <= 6.12.*unaffected
LinuxLinux6.18.52 <= 6.18.*unaffected
LinuxLinux7.2.6 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References