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ALSA-2026:24545 — Important: libyang security update

Affected: AlmaLinux:8: libyang

Libyang is YANG data modeling language parser and toolkit written (and providing API) in C.

Security Fix(es):

* libyang: libyang: Denial of Service or arbitrary code execution via maliciously crafted LYB binary blob (CVE-2026-44673)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

EUVD-2026-365496

fkie_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 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.

msrc_CVE-2026-44673 — libyang: lyb_read_string() integer overflow → heap buffer overflow

msrc_CVE-2026-44673

openSUSE-SU-2026:10880-1 — libyang-devel-3.13.6-3.1 on GA media

libyang-devel-3.13.6-3.1 on GA media

RHSA-2026:49666 — Red Hat Security Advisory: libyang security update

libyang: libyang: Denial of Service or arbitrary code execution via maliciously crafted LYB binary blob

RLSA-2026:24545 — Important: libyang security update

Affected: Rocky Linux:8: libyang

Libyang is YANG data modeling language parser and toolkit written (and providing API) in C.

Security Fix(es):

* libyang: libyang: Denial of Service or arbitrary code execution via maliciously crafted LYB binary blob (CVE-2026-44673)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

SUSE-SU-2026:22200-1 — Security update for libyang

Security update for libyang

Withdrawn: UBUNTU-CVE-2026-44673

Withdrawn by the publisher.

Affected: Ubuntu:20.04:LTS: libyang, Ubuntu:22.04:LTS: libyang, Ubuntu:22.04:LTS: libyang2, Ubuntu:24.04:LTS: libyang2, Ubuntu:25.10: libyang, Ubuntu:26.04:LTS: libyang

WID-SEC-W-2026-1820 — Red Hat Enterprise Linux (libyang): Schwachstelle ermöglicht Denial of Service

Ein entfernter, anonymer Angreifer kann eine Schwachstelle in Red Hat Enterprise Linux ausnutzen, um einen Denial of Service Angriff durchzuführen oder potenziell beliebigen Code auszuführen.