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I. Basic Information for CVE-2025-21669
Vulnerability Information

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Vulnerability Title
vsock/virtio: discard packets if the transport changes
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: vsock/virtio: discard packets if the transport changes If the socket has been de-assigned or assigned to another transport, we must discard any packets received because they are not expected and would cause issues when we access vsk->transport. A possible scenario is described by Hyunwoo Kim in the attached link, where after a first connect() interrupted by a signal, and a second connect() failed, we can find `vsk->transport` at NULL, leading to a NULL pointer dereference.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
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存在代码问题漏洞,该漏洞源于vsock协议在套接字被重新分配或未分配到传输层时,未正确丢弃接收到的包,可能导致访问未初始化或已释放的vsk->transport,引发空指针引用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
VendorProductAffected VersionsCPESubscribe
LinuxLinux c0cfa2d8a788fcf45df5bf4070ab2474c88d543a ~ 18a7fc371d1dbf8deff16c2dd9292bcc73f43040 -
LinuxLinux 5.5 -
II. Public POCs for CVE-2025-21669
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III. Intelligence Information for CVE-2025-21669
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IV. Related Vulnerabilities
V. Comments for CVE-2025-21669

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