Bug 2559115

Summary:	CVE-2026-115327 libyang: libyang: Denial of Service via crafted NETCONF RPC action envelope [fedora-rawhide]
Product:	[Fedora] Fedora	Reporter:	Laura Pardo <lpardo>
Component:	libyang	Assignee:	Tomas Korbar <tkorbar>
Status:	NEW ---	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	rawhide	CC:	jruzicka.pkg, mruprich, tkorbar
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["6d3d5c5d-9e14-4871-b8da-1172d909c822"]}
Fixed In Version:		Doc Type:	---
Doc Text:		Story Points:	---
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Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	2558847

Description Laura Pardo 2026-10-22 16:01:31 UTC

Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

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.