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.

suse_linux SUSE-SU-2026:22208-1: SUSE SLES16 : Security update for libyang (Important) (SUSE-SU-2026:22208-1)

The remote Alibaba Cloud Linux 3 host has a package installed that is affected by a vulnerability as referenced in the ALINUX3-SA-2026:0157 advisory.

    Package updates are available for Alibaba Cloud Linux 3 that fix the following vulnerabilities:

    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.

Tenable has extracted the preceding description block directly from the Alibaba Cloud Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2026:2381-1 advisory.

    This update for libyang fixes the following issue

    - CVE-2026-44673: integer overflow in `lyb_read_string()` of `src/parser_lyb.c` leads to heap buffer     overflow when       parsing a maliciously crafted LYB binary blob (bsc#1265330).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES12 host has a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:2334-1 advisory.

    This update for libyang fixes the following issues

    - CVE-2026-41401: use-after-free in `lyd_parser_set_data_flags` when processing crafted YANG XML documents     with specific       metadata attributes (bsc#1266316).
    - CVE-2026-44673: integer overflow in `lyb_read_string()` of `src/parser_lyb.c` leads to heap buffer     overflow when       parsing a maliciously crafted LYB binary blob (bsc#1265330).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES15 / SLES_SAP15 host has a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:2337-1 advisory.

    This update for libyang fixes the following issues

    - CVE-2026-41401: use-after-free in `lyd_parser_set_data_flags` when processing crafted YANG XML documents     with specific       metadata attributes (bsc#1266316).
    - CVE-2026-44673: integer overflow in `lyb_read_string()` of `src/parser_lyb.c` leads to heap buffer     overflow when       parsing a maliciously crafted LYB binary blob (bsc#1265330).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES15 / SLES_SAP15 host has a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:2335-1 advisory.

    This update for libyang fixes the following issues

    - CVE-2026-41401: use-after-free in `lyd_parser_set_data_flags` when processing crafted YANG XML documents     with specific       metadata attributes (bsc#1266316).
    - CVE-2026-44673: integer overflow in `lyb_read_string()` of `src/parser_lyb.c` leads to heap buffer     overflow when       parsing a maliciously crafted LYB binary blob (bsc#1265330).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote RockyLinux 9 host has packages installed that are affected by a vulnerability as referenced in the RLSA-2026:25051 advisory.

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

Tenable has extracted the preceding description block directly from the RockyLinux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote RockyLinux 10 host has packages installed that are affected by a vulnerability as referenced in the RLSA-2026:24758 advisory.

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

Tenable has extracted the preceding description block directly from the RockyLinux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote MiracleLinux 8 host has a package installed that is affected by a vulnerability as referenced in the AXSA:2026-777:01 advisory.

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

Tenable has extracted the preceding description block directly from the MiracleLinux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote RockyLinux 8 host has packages installed that are affected by a vulnerability as referenced in the RLSA-2026:24545 advisory.

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

Tenable has extracted the preceding description block directly from the RockyLinux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 9 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:25051 advisory.

    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.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 8 host has a package installed that is affected by a vulnerability as referenced in the ELSA-2026-24545 advisory.

    [1.0.184-2]
    - DoS or arbitrary code execution via maliciously crafted LYB binary blob
    - Resolves: RHEL-177017 - CVE-2026-44673

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote AlmaLinux 8 host has a package installed that is affected by a vulnerability as referenced in the ALSA-2026:24545 advisory.

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

Tenable has extracted the preceding description block directly from the AlmaLinux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 10 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2026:24758 advisory.

    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.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 8 host has a package installed that is affected by a vulnerability as referenced in the RHSA-2026:24545 advisory.

    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.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2026-44673)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
321243	Alibaba Cloud Linux 3 : 0157: libyang (ALINUX3-SA-2026:0157)	Nessus	Alibaba Cloud Linux Local Security Checks	high
321053	SUSE SLES15 Security Update : libyang (SUSE-SU-2026:2381-1)	Nessus	SuSE Local Security Checks	high
321038	SUSE SLES12 Security Update : libyang (SUSE-SU-2026:2334-1)	Nessus	SuSE Local Security Checks	high
321015	SUSE SLES15 Security Update : libyang (SUSE-SU-2026:2337-1)	Nessus	SuSE Local Security Checks	high
320996	SUSE SLES15 Security Update : libyang (SUSE-SU-2026:2335-1)	Nessus	SuSE Local Security Checks	high
320943	RockyLinux 9 : libyang (RLSA-2026:25051)	Nessus	Rocky Linux Local Security Checks	high
320606	RockyLinux 10 : libyang (RLSA-2026:24758)	Nessus	Rocky Linux Local Security Checks	high
320532	MiracleLinux 8 : libyang-1.0.184-2.el8_10.ML.1 (AXSA:2026-777:01)	Nessus	Miracle Linux Local Security Checks	high
320520	RockyLinux 8 : libyang (RLSA-2026:24545)	Nessus	Rocky Linux Local Security Checks	high
320447	RHEL 9 : libyang (RHSA-2026:25051)	Nessus	Red Hat Local Security Checks	high
320203	Oracle Linux 8 : libyang (ELSA-2026-24545)	Nessus	Oracle Linux Local Security Checks	high
320024	AlmaLinux 8 : libyang (ALSA-2026:24545)	Nessus	Alma Linux Local Security Checks	high
320019	RHEL 10 : libyang (RHSA-2026:24758)	Nessus	Red Hat Local Security Checks	high
319890	RHEL 8 : libyang (RHSA-2026:24545)	Nessus	Red Hat Local Security Checks	high
314935	Linux Distros Unpatched Vulnerability : CVE-2026-44673	Nessus	Misc.	high

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