CWE-1325 describes improperly controlled sequential memory allocation. It applies when software allocates memory repeatedly in a predictable sequence without enforcing a hard limit or checking whether the work is still justified.
This matters because attackers can turn normal protocol handling into a denial-of-service condition. If each small request, frame, or state transition causes another heap allocation, a remote peer may be able to drive memory growth far beyond what the service expected. The result is often resource exhaustion, slowdowns, or crashes rather than memory corruption. In networked software, this weakness commonly appears in validation logic, parsers, and connection state machines where the server keeps bookkeeping for untrusted input.
Defenders look for strict bounds on allocation loops, rate limits, and early rejection of excessive control traffic. Safe implementations reuse state when possible, cap per-peer resources, and stop processing when thresholds are reached. CWE-1325 is a reminder that even tiny protocol messages can become dangerous if they trigger repeated allocations.