CVE-2025-38566
Vulnerability Scoring
Analysis In Progress
CVE-2025-38566 Vulnerability Analysis & Exploit Details
CVE-2025-38566
Attack Complexity Details
-
Attack Complexity:
Attack Complexity Analysis In Progress
-
Attack Vector:
Attack Vector Under Analysis
-
Privileges Required:
None
No authentication is required for exploitation.
-
Scope:
Impact is confined to the initially vulnerable component.
-
User Interaction:
None
No user interaction is necessary for exploitation.
CVE-2025-38566 Details
Status: Awaiting Analysis
Last updated: 🕝 20 Aug 2025, 14:40 UTC
Originally published on: 🕔 19 Aug 2025, 17:15 UTC
CVSS Release:
CVE-2025-38566 Vulnerability Summary
CVE-2025-38566: In the Linux kernel, the following vulnerability has been resolved: sunrpc: fix handling of server side tls alerts Scott Mayhew discovered a security exploit in NFS over TLS in tls_alert_recv() due to its assumption it can read data from the msg iterator's kvec.. kTLS implementation splits TLS non-data record payload between the control message buffer (which includes the type such as TLS aler or TLS cipher change) and the rest of the payload (say TLS alert's level/description) which goes into the msg payload buffer. This patch proposes to rework how control messages are setup and used by sock_recvmsg(). If no control message structure is setup, kTLS layer will read and process TLS data record types. As soon as it encounters a TLS control message, it would return an error. At that point, NFS can setup a kvec backed msg buffer and read in the control message such as a TLS alert. Msg iterator can advance the kvec pointer as a part of the copy process thus we need to revert the iterator before calling into the tls_alert_recv.
Assessing the Risk of CVE-2025-38566
Access Complexity Graph
The exploitability of CVE-2025-38566 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-2025-38566
No exploitability data is available for CVE-2025-38566.
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-2025-38566, 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-2025-38566, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.
-
Confidentiality:
None
CVE-2025-38566 does not compromise confidentiality.
-
Integrity:
None
CVE-2025-38566 does not impact data integrity.
-
Availability:
None
CVE-2025-38566 does not affect system availability.
CVE-2025-38566 References
External References
- https://git.kernel.org/stable/c/25bb3647d30a20486b5fe7cff2b0e503c16c9692
- https://git.kernel.org/stable/c/3b549da875414989f480b66835d514be80a0bd9c
- https://git.kernel.org/stable/c/6b33c31cc788073bfbed9297e1f4486ed73d87da
- https://git.kernel.org/stable/c/b1df394621710b312f0393e3f240fdac0764f968
- https://git.kernel.org/stable/c/bee47cb026e762841f3faece47b51f985e215edb
CWE Common Weakness Enumeration
Unknown
Protect Your Infrastructure against CVE-2025-38566: Combat Critical CVE Threats
Stay updated with real-time CVE vulnerabilities and take action to secure your systems. Enhance your cybersecurity posture with the latest threat intelligence and mitigation techniques. Develop the skills necessary to defend against CVEs and secure critical infrastructures. Join the top cybersecurity professionals safeguarding today's infrastructures.
Other 5 Recently Published CVEs Vulnerabilities
- CVE-2025-48042 – Incorrect Authorization vulnerability in ash-project ash allows Exploiting Incorrectly Configured Access Control Security Levels. This vulnerabilit...
- CVE-2025-39734 – In the Linux kernel, the following vulnerability has been resolved: Revert "fs/ntfs3: Replace inode_trylock with inode_lock" This reverts commit ...
- CVE-2025-39733 – In the Linux kernel, the following vulnerability has been resolved: team: replace team lock with rtnl lock syszbot reports various ordering issue...
- CVE-2025-39732 – In the Linux kernel, the following vulnerability has been resolved: wifi: ath11k: fix sleeping-in-atomic in ath11k_mac_op_set_bitrate_mask() ath1...
- CVE-2025-39731 – In the Linux kernel, the following vulnerability has been resolved: f2fs: vm_unmap_ram() may be called from an invalid context When testing F2FS ...