CVE-2026-40881— Zebra: addr/addrv2 Deserialization Resource Exhaustion

Zebra: addr/addrv2 Deserialization Resource Exhaustion

ZEBRA is a Zcash node written entirely in Rust. Prior to zebrad version 4.3.0 and zebra-network version 5.0.1, when deserializing addr or addrv2 messages, which contain vectors of addresses, Zebra would fully deserialize them up to a maximum length (over 233,000) that was derived from the 2 MiB message size limit. This is much larger than the actual limit of 1,000 messages from the specification. Zebra would eventually check that limit but, at that point, the memory for the larger vector was already allocated. An attacker could cause out-of-memory aborts in Zebra by sending multiple such messages over different connections. This vulnerability is fixed in zebrad version 4.3.0 and zebra-network version 5.0.1.

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不加限制或调节的资源分配

zebra 安全漏洞

zebra是Zcash Foundation开源的一个用Rust编写的Zcash全节点实现。 zebra 4.3.0之前版本和zebra-network 5.0.1之前版本存在安全漏洞，该漏洞源于反序列化addr或addrv2消息时，在检查实际消息数量限制前分配过多内存，可能导致内存耗尽。

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