libyang from v2.0.164 to v2.1.30 was discovered to contain a NULL pointer dereference via the function lysp_stmt_validate_value at lys_parse_mem.c.

The AlmaLinux 9.2 host has packages installed that are affected by a vulnerability as referenced in the TuxCare ALMALINUX9.2:CLSA-2026:1786710499 advisory.

  - libyang from v2.0.164 to v2.1.30 was discovered to contain a NULL pointer dereference via the function     lysp_stmt_validate_value at lys_parse_mem.c. (CVE-2023-26917)

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

The remote Ubuntu 24.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-7752-1 advisory.

    It was discovered that libyang incorrectly handled certain memory operations when parsing YANG strings. An     attacker could possibly use this issue to cause libyang to crash, resulting in a denial of service.

Tenable has extracted the preceding description block directly from the Ubuntu 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 version of Tencent Linux installed on the remote TencentOS Server 4 host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the TSSA-2025:0069 advisory.

    Package updates are available for TencentOS Server 4 that fix the following vulnerabilities:

    CVE-2023-26916:
    libyang from v2.0.164 to v2.1.30 was discovered to contain a NULL pointer dereference via the function     lys_parse_mem at lys_parse_mem.c.

    CVE-2023-26917:
    libyang from v2.0.164 to v2.1.30 was discovered to contain a NULL pointer dereference via the function     lysp_stmt_validate_value at lys_parse_mem.c.

Tenable has extracted the preceding description block directly from the Tencent Linux 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 Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - libyang from v2.0.164 to v2.1.30 was discovered to contain a NULL pointer dereference via the function     lysp_stmt_validate_value at lys_parse_mem.c. (CVE-2023-26917)

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

An update of the libyang package has been released.

ID	Name	Product	Family	Type	Severity
361678	AlmaLinux 9.2 [TuxCare] Security Update: libyang / libyang-devel / libyang-devel-doc (ALMALINUX9.2:CLSA-2026:1786710499)	Nessus	Alma Linux Local Security Checks	Local	high
265348	Ubuntu 24.04 LTS : libyang vulnerabilities (USN-7752-1)	Nessus	Ubuntu Local Security Checks	Local	high
238647	TencentOS Server 4: libyang (TSSA-2025:0069)	Nessus	Tencent Local Security Checks	Local	high
226023	Linux Distros Unpatched Vulnerability : CVE-2023-26917	Nessus	Misc.	Local	high
203155	Photon OS 4.0: Libyang PHSA-2023-4.0-0380	Nessus	PhotonOS Local Security Checks	Local	high

Detections

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CVE-2023-26917

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Tenable Plugins

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