Medium severity · published Oct 22, 2026
CVE-2026-115327
libyang through 6.4.13 Uninitialized Pointer Free in NETCONF RPC Parser
5.3
CVSS
0.3%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 23% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
libyang · CESNET
through 6.4.13 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-115327
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-115327
github.com
https://github.com/CESNET/libyang
github.com
https://github.com/CESNET/libyang/blob/v6.4.13/src/parser_xml.c#L1196-L1224
github.com
https://github.com/CESNET/libyang/blob/v6.4.13/src/parser_xml.c#L1330-L1342
github.com
https://github.com/CESNET/libyang/commit/927fce908774289a7d9c07fff5704c33965c9773
github.com
https://github.com/CESNET/libyang/issues/2595
hackmd.io
https://hackmd.io/@haindpwn/libyang-netconf-rpc-envelope-uninit-free
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