CVE-2025-21871

Source
https://nvd.nist.gov/vuln/detail/CVE-2025-21871
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-21871.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2025-21871
Downstream
Related
Published
2025-03-27T14:15:48Z
Modified
2025-08-09T19:01:27Z
Summary
[none]
Details

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

tee: optee: Fix supplicant wait loop

OP-TEE supplicant is a user-space daemon and it's possible for it be hung or crashed or killed in the middle of processing an OP-TEE RPC call. It becomes more complicated when there is incorrect shutdown ordering of the supplicant process vs the OP-TEE client application which can eventually lead to system hang-up waiting for the closure of the client application.

Allow the client process waiting in kernel for supplicant response to be killed rather than indefinitely waiting in an unkillable state. Also, a normal uninterruptible wait should not have resulted in the hung-task watchdog getting triggered, but the endless loop would.

This fixes issues observed during system reboot/shutdown when supplicant got hung for some reason or gets crashed/killed which lead to client getting hung in an unkillable state. It in turn lead to system being in hung up state requiring hard power off/on to recover.

References

Affected packages