Zebra: addr/addrv2 Deserialization Resource Exhaustion
Zebra: addr/addrv2 Deserialization Resource Exhaustion. 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.
Vuln-watch · relayed from the GitHub Advisory Database; see Source & attribution below
Summary
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.
Affected
- zebrad (rust) < 4.3.1 — fixed in 4.3.1
- zebra-network (rust) < 5.0.1 — fixed in 5.0.1
Severity
Medium (CVSS 6.3), as rated by the upstream advisory.
Recommended actions
- Upgrade zebrad to 4.3.1 or later
- Upgrade zebra-network to 5.0.1 or later
Source & attribution
This 0xCERT advisory summarises GHSA-xr93-pcq3-pxf8 / CVE-2026-40881 from the GitHub Advisory Database, credited upstream to Zk-nd3r, oxarbitrage, conradoplg, mpguerra: https://github.com/advisories/GHSA-xr93-pcq3-pxf8. Details may change; refer to the original source for the authoritative record.
References
OpenPGP-signed. The signed text of this advisory verifies against the 0xCERT key CCC7 D9EC 9415 723D.
Published 2026-04-18 · last updated 2026-10-08
curl -s https://www.0xcert.com/pgp.asc | gpg --import && curl -s https://www.0xcert.com/advisory/0xCERT-2026-0227/signed.txt | gpg --verify