EUVD-2026-30484CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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2DescriptionNVD
libyang is a YANG data modeling language library. Prior to SO 5.2.15, lyb_read_string() in src/parser_lyb.c contains an integer overflow that results in a heap buffer overflow when parsing a maliciously crafted LYB binary blob. An attacker who can supply LYB data to any libyang consumer (NETCONF server, sysrepo, etc.) can trigger a crash or potential heap corruption. This vulnerability is fixed in SO 5.2.15.
AnalysisAI
Integer overflow in libyang's lyb_read_string() function leads to heap buffer overflow during LYB binary parsing, enabling remote denial-of-service attacks against NETCONF servers, sysrepo, and other YANG data consumers. The vulnerability (CWE-190) allows unauthenticated attackers to crash services by supplying maliciously crafted LYB blobs over network connections. …
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RemediationAI
Within 24 hours: Identify all systems running libyang versions prior to 5.2.15 using software inventory and vulnerability scanning tools; document exposure scope including NETCONF servers, sysrepo instances, and YANG-consuming applications. Within 7 days: Evaluate upgrade feasibility to libyang 5.2.15 or later; prioritize systems with direct network exposure. …
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