一、 漏洞 CVE-2025-39682 基础信息
漏洞信息
                                        # TLS零长度记录处理漏洞

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漏洞标题
tls: fix handling of zero-length records on the rx_list
来源：美国国家漏洞数据库 NVD
漏洞描述信息
In the Linux kernel, the following vulnerability has been resolved: tls: fix handling of zero-length records on the rx_list Each recvmsg() call must process either - only contiguous DATA records (any number of them) - one non-DATA record If the next record has different type than what has already been processed we break out of the main processing loop. If the record has already been decrypted (which may be the case for TLS 1.3 where we don't know type until decryption) we queue the pending record to the rx_list. Next recvmsg() will pick it up from there. Queuing the skb to rx_list after zero-copy decrypt is not possible, since in that case we decrypted directly to the user space buffer, and we don't have an skb to queue (darg.skb points to the ciphertext skb for access to metadata like length). Only data records are allowed zero-copy, and we break the processing loop after each non-data record. So we should never zero-copy and then find out that the record type has changed. The corner case we missed is when the initial record comes from rx_list, and it's zero length.
来源：美国国家漏洞数据库 NVD
CVSS信息
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来源：美国国家漏洞数据库 NVD
漏洞类别
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来源：美国国家漏洞数据库 NVD
漏洞标题
Linux kernel 安全漏洞
来源：中国国家信息安全漏洞库 CNNVD
漏洞描述信息
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于tls模块处理rx_list上零长度记录时存在问题。
来源：中国国家信息安全漏洞库 CNNVD
CVSS信息
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来源：中国国家信息安全漏洞库 CNNVD
漏洞类别
其他
来源：中国国家信息安全漏洞库 CNNVD
二、漏洞 CVE-2025-39682 的公开POC
# POC 描述 源链接 神龙链接
1 A variant of CVE-2024-58239 https://github.com/khoatran107/cve-2025-39682 POC详情
三、漏洞 CVE-2025-39682 的情报信息
四、漏洞 CVE-2025-39682 的评论

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