Learning Center - What is buffer overflow?

A buffer overflow occurs when a program writing data to a buffer overloads that buffer’s capacity. It’s like pouring 12 ounces of milk into an 8 ounce glass. Buffer overflow is an anomaly that occurs when software writing data to a buffer overflows the buffer’s capacity, resulting in adjacent memory locations being overwritten. In other words, too much information is being passed into a container that does not have enough space, and that information ends up replacing data in adjacent containers.

Buffer overflows can be exploited by attackers with a goal of modifying a computer’s memory in order to undermine or take control of program execution. Learn more about how to keep your site safe in the Cloudflare Learning Center.

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