CVE-2026-93085

Summary

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

firmware: arm_scmi: Reject out of range DT protocol IDs

SCMI protocol IDs carried in message headers are limited by MSG_PROTOCOL_ID_MASK. The DT parsing paths noticed protocol IDs outside that range, but only logged an error and then kept processing the invalid value.

That lets a malformed 32-bit DT reg value reach helpers which take a u8 protocol ID, where it can be truncated and/or treated as a different protocol.

For channel setup, two different out-of-range values can also be used as distinct IDR keys while aliasing the generated SCMI protocol identity.

Skip DT protocol nodes whose reg value does not fit the SCMI protocol ID field before setting up channels or creating protocol devices.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1 < 8eb2ab209570526728b35e39c4aecdb5099fbaf7affected
LinuxLinux05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1 < 5142fd31bd8c9aff9bad4f6e0cc20e9574f2cee1affected
LinuxLinux05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1 < e66756313d1b4eadd13f39a0aee9fc8773d4d375affected
LinuxLinux05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1 < 0b6e59eb885f985a5ea7beed385adfa9412b324daffected
LinuxLinux05a2801d8b90c1b5159618d4bd3a3c65d60f3ff1 < 59407ccb52130f2c81f4b3cbe4f14114afceb54faffected
LinuxLinux6.3affected
LinuxLinux0 < 6.3unaffected
LinuxLinux6.6.157 <= 6.6.*unaffected
LinuxLinux6.12.110 <= 6.12.*unaffected
LinuxLinux6.18.52 <= 6.18.*unaffected
LinuxLinux7.2.6 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References