CVE-2026-93082 PUBLISHED

firmware: arm_scmi: Unwind P2A receiver mailbox setup failure

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: Unwind P2A receiver mailbox setup failure

mailbox_chan_setup() can request an additional P2A receiver channel after successfully acquiring the primary P2A channel. If that later 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.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from fa8b28ba22d95be4d2dd3c37fbdbdc066af82941 to 4c2a5d72357e5c6743c23b59615da287140d9d31 (excl.)
  • affected from fa8b28ba22d95be4d2dd3c37fbdbdc066af82941 to 3b0b02134ab90202af80b102fa37196b9689e86f (excl.)
  • affected from fa8b28ba22d95be4d2dd3c37fbdbdc066af82941 to 3515aed7fe424b79c49ff9cd51f7802a64a4ab7b (excl.)
  • affected from fa8b28ba22d95be4d2dd3c37fbdbdc066af82941 to f3e3773c4e5e96549d7540d8ddeb4fcd534f6f1d (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 6.11 is affected
  • unaffected from 0 to 6.11 (excl.)
  • 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