CVE-2026-115327

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libyang Uninitialized Pointer Free in NETCONF RPC Parsing

Publication date: 2026-10-22

Last updated on: 2026-10-22

Assigner: VulnCheck

Description

libyang through 6.4.13 contains an uninitialized pointer free vulnerability in lydxml_env_netconf_rpc() in src/parser_xml.c when parsing NETCONF rpc action envelopes. Peers with a NETCONF session can send an action element containing non-whitespace text via lyd_parse_op() to crash servers like netopeer2 or corrupt the heap.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-10-22

Last Modified

2026-10-22

Generated

2026-10-23

AI Q&A

2026-10-23

EPSS Evaluated

N/A

NVD

CVE-2026-115327

Affected Vendors & Products

Vendor	Product	Version / Range
CESNET	libyang	0

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-824	The product accesses or uses a pointer that has not been initialized.

Attack-Flow Graph

Executive Summary

libyang through 6.4.13 has an uninitialized pointer free vulnerability in the lydxml_env_netconf_rpc() function. When parsing NETCONF rpc action envelopes, peers can send malicious action elements with non-whitespace text via lyd_parse_op() to crash servers like netopeer2 or corrupt the heap.

Impact Analysis

This vulnerability can cause denial of service by crashing NETCONF servers or corrupting memory, leading to service disruption. Attackers with network access to a vulnerable system could exploit it to destabilize operations.

Compliance Impact

This vulnerability may impact compliance by causing service disruptions or data corruption, which could violate availability requirements in GDPR or HIPAA. Downtime or data loss could lead to non-compliance penalties.

Mitigation Strategies

Update libyang to version 6.4.14 or later to address the uninitialized pointer free vulnerability. Monitor NETCONF sessions for malformed action elements containing non-whitespace text.

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