CVE-2025-21871

tee: optee: Fix supplicant wait loop

State: Published
Severity: Not scored
Published: Mar 27, 2025
Updated: May 11, 2026
Reserved: Dec 29, 2024

Description

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2 to before 3eb4911364c764572e9db4ab900a57689a54e8ceAffected 4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2 to before 0180cf0373f84fff61b16f8c062553a13dd7cfcaAffected 4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2 to before c0a9a948159153be145f9471435695373904ee6dAffected 4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2 to before ec18520f5edc20a00c34a8c9fdd6507c355e880fAffected 4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2 to before d61cc1a435e6894bfb0dd3370c6f765d2d12825dAffected 4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2 to before fd9d2d6124c293e40797a080adf8a9c237efd8b8Affected 4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2 to before 21234efe2a8474a6d2d01ea9573319de7858ce44Affected 4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2 to before 70b0d6b0a199c5a3ee6c72f5e61681ed6f759612Affected
LinuxLinux	4.12Affected before 4.12Not affected 5.4.291 through 5.4.Not affected 5.10.235 through 5.10.Not affected 5.15.179 through 5.15.Not affected 6.1.130 through 6.1.Not affected 6.6.80 through 6.6.Not affected 6.12.17 through 6.12.Not affected 6.13.5 through 6.13.*Not affected 6.14 and laterNot affected

Product

Versions

LinuxLinux

4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2 to before 3eb4911364c764572e9db4ab900a57689a54e8ceAffected
4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2 to before 0180cf0373f84fff61b16f8c062553a13dd7cfcaAffected
4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2 to before c0a9a948159153be145f9471435695373904ee6dAffected
4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2 to before ec18520f5edc20a00c34a8c9fdd6507c355e880fAffected
4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2 to before d61cc1a435e6894bfb0dd3370c6f765d2d12825dAffected
4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2 to before fd9d2d6124c293e40797a080adf8a9c237efd8b8Affected
4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2 to before 21234efe2a8474a6d2d01ea9573319de7858ce44Affected
4fb0a5eb364d239722e745c02aef0dbd4e0f1ad2 to before 70b0d6b0a199c5a3ee6c72f5e61681ed6f759612Affected

LinuxLinux

4.12Affected
before 4.12Not affected
5.4.291 through 5.4.*Not affected
5.10.235 through 5.10.*Not affected
5.15.179 through 5.15.*Not affected
6.1.130 through 6.1.*Not affected
6.6.80 through 6.6.*Not affected
6.12.17 through 6.12.*Not affected
6.13.5 through 6.13.*Not affected
6.14 and laterNot affected

References

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