CVE-2026-115327

medium

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.

References

https://www.vulncheck.com/advisories/libyang-through-6.4.13-uninitialized-pointer-free-in-netconf-rpc-parser

https://hackmd.io/@haindpwn/libyang-netconf-rpc-envelope-uninit-free

https://github.com/CESNET/libyang/issues/2595

https://github.com/CESNET/libyang/commit/927fce908774289a7d9c07fff5704c33965c9773

https://github.com/CESNET/libyang/blob/v6.4.13/src/parser_xml.c#L1330-L1342

https://github.com/CESNET/libyang/blob/v6.4.13/src/parser_xml.c#L1196-L1224

https://github.com/CESNET/libyang

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-108129

Details

Source: Mitre, NVD

Published: 2026-10-22

Updated: 2026-10-22

Risk Information

CVSS v2

Base Score: 4.9

Vector: CVSS2#AV:N/AC:H/Au:S/C:N/I:N/A:C

Severity: Medium

CVSS v3

Base Score: 5.3

Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Severity: Medium

CVSS v4

Base Score: 6

Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Severity: Medium

EPSS

EPSS: 0.00307