CVE-2025-47270 nimiq-network-libp2p Uncontrolled Resource Consumption vulnerability
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2025-47270?
CVE-2025-47270 is a high-severity vulnerability in nimiq core-rs-albatross, published on 12 May 2025.
Official description
nimiq/core-rs-albatross is a Rust implementation of the Nimiq Proof-of-Stake protocol based on the Albatross consensus algorithm. The `nimiq-network-libp2p` subcrate of nimiq/core-rs-albatross is vulnerable to a Denial of Service (DoS) attack due to uncontrolled memory allocation. Specifically, the implementation of the `Discovery` network message handling allocates a buffer based on a length value provided by the peer, without enforcing an upper bound. Since this length is a `u32`, a peer can trigger allocations of up to 4 GB, potentially leading to memory exhaustion and node crashes. As Discovery messages are regularly exchanged for peer discovery, this vulnerability can be exploited repeatedly. The patch for this vulnerability is formally released as part of v1.1.0. The patch implements a limit to the discovery message size of 1 MB and also resizes the message buffer size incrementally as the data is read. No known workarounds are available.
Weakness: CWE-400
Which versions are affected by CVE-2025-47270?
How do I fix CVE-2025-47270?
No fix has been published for CVE-2025-47270 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-47270 being exploited?
There is no known exploitation of CVE-2025-47270 in the wild and no public exploit code.
Sources
Also known as GHSA-3v6r-9cr8-q433.