Loop with Unreachable Exit Condition ('Infinite Loop') Affecting linux-virt-doc package, versions <6.12.18-r0


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.07% (21st percentile)

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  • Snyk IDSNYK-MINIMOSLATEST-LINUXVIRTDOC-13782960
  • published31 Oct 2025
  • disclosed27 Mar 2025

Introduced: 27 Mar 2025

CVE-2025-21871  (opens in a new tab)
CWE-835  (opens in a new tab)

How to fix?

Upgrade Minimos:latest linux-virt-doc to version 6.12.18-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream linux-virt-doc package and not the linux-virt-doc package as distributed by Minimos. See How to fix? for Minimos:latest relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1