CVE-2025-21871
Vulnerability Scoring
Analysis In Progress
CVE-2025-21871 Vulnerability Analysis & Exploit Details
CVE-2025-21871
Attack Complexity Details
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Attack Complexity:
Attack Complexity Analysis In Progress
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Attack Vector:
Attack Vector Under Analysis
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Privileges Required:
None
No authentication is required for exploitation.
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Scope:
Impact is confined to the initially vulnerable component.
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User Interaction:
None
No user interaction is necessary for exploitation.
CVE-2025-21871 Details
Status: Awaiting Analysis
Published on: 27 Mar 2025, 14:15 UTC
CVSS Release:
CVE-2025-21871 Vulnerability Summary
CVE-2025-21871: 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.
Assessing the Risk of CVE-2025-21871
Access Complexity Graph
The exploitability of CVE-2025-21871 depends on two key factors: attack complexity (the level of effort required to execute an exploit) and privileges required (the access level an attacker needs).
Exploitability Analysis for CVE-2025-21871
No exploitability data is available for CVE-2025-21871.
Understanding AC and PR
A lower complexity and fewer privilege requirements make exploitation easier. Security teams should evaluate these aspects to determine the urgency of mitigation strategies, such as patch management and access control policies.
Attack Complexity (AC) measures the difficulty in executing an exploit. A high AC means that specific conditions must be met, making an attack more challenging, while a low AC means the vulnerability can be exploited with minimal effort.
Privileges Required (PR) determine the level of system access necessary for an attack. Vulnerabilities requiring no privileges are more accessible to attackers, whereas high privilege requirements limit exploitation to authorized users with elevated access.
CVSS Score Breakdown Chart
Above is the CVSS Sub-score Breakdown for CVE-2025-21871, illustrating how Base, Impact, and Exploitability factors combine to form the overall severity rating. A higher sub-score typically indicates a more severe or easier-to-exploit vulnerability.
CIA Impact Analysis
Below is the Impact Analysis for CVE-2025-21871, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.
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Confidentiality:
None
CVE-2025-21871 does not compromise confidentiality.
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Integrity:
None
CVE-2025-21871 does not impact data integrity.
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Availability:
None
CVE-2025-21871 does not affect system availability.
CVE-2025-21871 References
External References
- https://git.kernel.org/stable/c/0180cf0373f84fff61b16f8c062553a13dd7cfca
- https://git.kernel.org/stable/c/21234efe2a8474a6d2d01ea9573319de7858ce44
- https://git.kernel.org/stable/c/3eb4911364c764572e9db4ab900a57689a54e8ce
- https://git.kernel.org/stable/c/70b0d6b0a199c5a3ee6c72f5e61681ed6f759612
- https://git.kernel.org/stable/c/c0a9a948159153be145f9471435695373904ee6d
- https://git.kernel.org/stable/c/d61cc1a435e6894bfb0dd3370c6f765d2d12825d
- https://git.kernel.org/stable/c/ec18520f5edc20a00c34a8c9fdd6507c355e880f
- https://git.kernel.org/stable/c/fd9d2d6124c293e40797a080adf8a9c237efd8b8
CWE Common Weakness Enumeration
Unknown
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