CVE-2026-44673
Fixed in a distro release EPSS <1%CVSS 7.5
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.
Products: CESNET libyang, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On, Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On, Red Hat Enterprise Linux 8.8 Telecommunications Update Service, Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions, Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions, Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions, Red Hat Enterprise Linux 9.6 Extended Update Support
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| AlmaLinux 10 | libyang | 2.1.148-4.el10_2 |
| AlmaLinux 10 | libyang-devel | 2.1.148-4.el10_2 |
| AlmaLinux 10 | libyang-devel-doc | 2.1.148-4.el10_2 |
| AlmaLinux 8 | libyang | 1.0.184-2.el8_10 |
| AlmaLinux 9 | libyang | 2.1.148-1.el9_8.1 |
| AlmaLinux 9 | libyang-devel | 2.1.148-1.el9_8.1 |
| AlmaLinux 9 | libyang-devel-doc | 2.1.148-1.el9_8.1 |
| Debian 12 | libyang2 | no fix |
| Debian 13 | libyang | no fix |
| Debian 14 | libyang | 6.4.13-1 |
| Red Hat Enterprise Linux 10.2 | libyang | 0:2.1.148-4.el10_2 |
| Red Hat Enterprise Linux 10.2 | libyang-debuginfo | 0:2.1.148-4.el10_2 |
| Red Hat Enterprise Linux 10.2 | libyang-debugsource | 0:2.1.148-4.el10_2 |
| Red Hat Enterprise Linux 10.2 | libyang-devel | 0:2.1.148-4.el10_2 |
| Red Hat Enterprise Linux 10.2 | libyang-devel-doc | 0:2.1.148-4.el10_2 |
| Red Hat Enterprise Linux 10.2 | libyang-tools-debuginfo | 0:2.1.148-4.el10_2 |
| Red Hat Enterprise Linux 8 | libyang | 0:1.0.184-2.el8_10 |
| Red Hat Enterprise Linux 8 | libyang-cpp-debuginfo | 0:1.0.184-2.el8_10 |
| Red Hat Enterprise Linux 8 | libyang-debuginfo | 0:1.0.184-2.el8_10 |
| Red Hat Enterprise Linux 8 | libyang-debugsource | 0:1.0.184-2.el8_10 |
| Red Hat Enterprise Linux 8 | python3-libyang-debuginfo | 0:1.0.184-2.el8_10 |
| Red Hat Enterprise Linux 9 | libyang | 0:2.1.148-1.el9_8.1 |
| Red Hat Enterprise Linux 9 | libyang-debuginfo | 0:2.1.148-1.el9_8.1 |
| Red Hat Enterprise Linux 9 | libyang-debugsource | 0:2.1.148-1.el9_8.1 |
| Red Hat Enterprise Linux 9 | libyang-devel | 0:2.1.148-1.el9_8.1 |
| Red Hat Enterprise Linux 9 | libyang-devel-doc | 0:2.1.148-1.el9_8.1 |
| Red Hat Enterprise Linux eus 10.0 | libyang | 0:2.1.148-2.el10_0.1 |
| Red Hat Enterprise Linux eus 10.0 | libyang-debuginfo | 0:2.1.148-2.el10_0.1 |
| Red Hat Enterprise Linux eus 10.0 | libyang-debugsource | 0:2.1.148-2.el10_0.1 |
| Red Hat Enterprise Linux eus 10.0 | libyang-tools-debuginfo | 0:2.1.148-2.el10_0.1 |
| Red Hat rhel aus 8.4 | libyang | 0:1.0.184-1.el8_4.1 |
| Red Hat rhel aus 8.6 | libyang | 0:1.0.184-1.el8_6.1 |
| Red Hat rhel e4s 8.8 | libyang | 0:1.0.184-1.el8_8.1 |
| Red Hat rhel e4s 9.2 | libyang | 0:2.1.148-1.el9_2.1 |
| Red Hat rhel e4s 9.4 | libyang | 0:2.1.148-1.el9_4.1 |
| Red Hat rhel eus 9.6 | libyang | 0:2.1.148-1.el9_6.1 |
| Red Hat rhel eus long life 8.4 | libyang | 0:1.0.184-1.el8_4.1 |
| Red Hat rhel eus long life 8.6 | libyang | 0:1.0.184-1.el8_6.1 |
| Red Hat rhel tus 8.8 | libyang | 0:1.0.184-1.el8_8.1 |
| Rocky Linux 10 | libyang | 0:2.1.148-4.el10_2 |
| Rocky Linux 8 | libyang | 0:1.0.184-2.el8_10 |
| Rocky Linux 9 | libyang | 0:2.1.148-1.el9_8.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | libyang | 1.0.184-150300.3.9.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | libyang | 1.0.184-150300.3.9.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | libyang | 2.1.55-150500.3.5.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | libyang | 2.1.55-150500.3.5.1 |
| SUSE Linux Enterprise Module for Server Applications 15 SP7 | libyang | 2.1.148-150700.3.5.1 |
| SUSE Linux Enterprise Server 12 SP5-LTSS | libyang | 2.1.148-8.8.1 |
| SUSE Linux Enterprise Server 15 SP4-LTSS | libyang | 1.0.184-150300.3.9.1 |
| SUSE Linux Enterprise Server 15 SP5-LTSS | libyang | 2.1.55-150500.3.5.1 |
| SUSE Linux Enterprise Server 15 SP6-LTSS | libyang | 2.1.55-150500.3.5.1 |
| SUSE Linux Enterprise Server 16.0 | libyang | 2.1.148-160000.4.1 |
| SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 | libyang | 2.1.148-8.8.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | libyang | 1.0.184-150300.3.9.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | libyang | 2.1.55-150500.3.5.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | libyang | 2.1.55-150500.3.5.1 |
| SUSE Linux Enterprise Server for SAP applications 16.0 | libyang | 2.1.148-160000.4.1 |
| openSUSE Leap 16.0 | libyang | 2.1.148-160000.4.1 |
| openSUSE Tumbleweed | libyang | 3.13.6-3.1 |