Linux Kernel Vulnerability in TCP Data Handling

CVE-2025-38463

What is CVE-2025-38463?

A vulnerability in the Linux kernel's TCP data handling can lead to improper space calculations, risking memory overflow. When sending data, if a socket buffer (skb) exists at the tail of the write queue, faulty code checks for available space, leading to incorrect signedness in calculations. This flaw results in excessive values assigned to sk->sk_forward_alloc, which can overflow and potentially compromise system stability and security. Real-world exploitation may occur, emphasizing the importance of immediate updates to maintain protection.

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