CVE-2026-44673: 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…

PriorityP344high7.5CVSS 3.1

AVNACLPRNUINSUCNINAH

EPSS

0.43%

34.7th percentile

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.

Affected

2 ranges

Vendor	Product	Version range	Fixed in
cesnet	libyang	< SO 5.2.15	SO 5.2.15
cesnet	libyang	—	—

CVSS provenance

nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

vendor_redhat7.5HIGH

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