In the Linux kernel, the following vulnerability has been resolved:
firmware: arm_scmi: Check mailbox/SMT channel for consistency
On reception of a completion interrupt the shared memory area is accessed
to retrieve the message header at first and then, if the message sequence
number identifies a transaction which is still pending, the related
payload is fetched too.
When an SCMI command times out the channel ownership remains with the
platform until eventually a late reply is received and, as a consequence,
any further transmission attempt remains pending, waiting for the channel
to be relinquished by the platform.
Once that late reply is received the channel ownership is given back
to the agent and any pending request is then allowed to proceed and
overwrite the SMT area of the just delivered late reply; then the wait
for the reply to the new request starts.
It has been observed that the spurious IRQ related to the late reply can
be wrongly associated with the freshly enqueued request: when that happens
the SCMI stack in-flight lookup procedure is fooled by the fact that the
message header now present in the SMT area is related to the new pending
transaction, even though the real reply has still to arrive.
This race-condition on the A2P channel can be detected by looking at the
channel status bits: a genuine reply from the platform will have set the
channel free bit before triggering the completion IRQ.
Add a consistency check to validate such condition in the A2P ISR.
Metrics
Affected Vendors & Products
References
History
Mon, 04 Nov 2024 13:15:00 +0000
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MITRE
Status: PUBLISHED
Assigner: Linux
Published: 2024-03-13T14:01:48.870Z
Updated: 2024-12-19T08:22:31.429Z
Reserved: 2024-03-02T21:55:42.574Z
Link: CVE-2023-52608
Vulnrichment
Updated: 2024-08-02T23:03:21.210Z
NVD
Status : Awaiting Analysis
Published: 2024-03-13T14:15:07.240
Modified: 2024-11-21T08:40:11.287
Link: CVE-2023-52608
Redhat