CVE-2023-26916

libyang from v2.0.164 to v2.1.30 was discovered to contain a NULL pointer dereference via the...

5.3 MediumFix available

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: Low

Exploit likelihood

0.99%Up 0.9 points since Apr 4, 2023

What each source reports

NVD Score used 5.3

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.

Record: CVE-2023-26916
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weakness: CWE-476
Updated: 2026-11-02

CVE List No score

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.

Record: CVE-2023-26916
Updated: 2026-11-02

EUVDEUVD-2023-30708 0.0

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.

Record: EUVD-2023-30708
CVSS: 0.0 NoneCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Updated: 2026-11-02

GitHub AdvisoriesGHSA-rgjq-f6gr-756j 7.5

libyang from v2.0.164 to v2.1.30 was discovered to contain a NULL pointer dereference via the...

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.

Record: GHSA-rgjq-f6gr-756j
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-476
Updated: 2026-11-02

OSVAZL-25966 5.3

CVE-2023-26916 affecting package libyang for versions less than 2.1.55-1

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.

Record: AZL-25966
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Updated: 2026-11-02

OSVDEBIAN-CVE-2023-26916 5.3

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.

Record: DEBIAN-CVE-2023-26916
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Updated: 2026-11-02

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OSVUBUNTU-CVE-2023-26916 5.3

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.

Record: UBUNTU-CVE-2023-26916
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Updated: 2026-11-02

OSV No score

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.

Record: CVE-2023-26916
Updated: 2026-11-02

OSVopenSUSE-SU-2024:12836-1 No score

libyang-devel-2.1.55-1.1 on GA media

These are all security issues fixed in the libyang-devel-2.1.55-1.1 package on the GA media of openSUSE Tumbleweed.

Record: openSUSE-SU-2024:12836-1
Updated: 2026-11-02

OSVUSN-7752-1 No score

libyang2 vulnerabilities

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.

Record: USN-7752-1
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`libyang` Azure Linux:2	before 2.1.55-1	2.1.55-1
`libyang` Debian:13	before 3.4.2+dfsg-2	3.4.2+dfsg-2
`libyang` Debian:14	before 3.4.2+dfsg-2	3.4.2+dfsg-2
`libyang2` Debian:12	All versions, plus listed versions 2.1.148-0.12.1.148-0.22.1.30-22.1.30-2.12.1.30-2.1~exp1	None known
`libyang2` Ubuntu:24.04:LTS	before 2.1.30-2.1ubuntu0.1, plus listed versions 2.1.30-22.1.30-2.12.1.30-2.1build1	2.1.30-2.1ubuntu0.1
`libyang2` Ubuntu:24.04:LTS From an advisory covering 2 CVEs	before 2.1.30-2.1ubuntu0.1, plus listed versions 2.1.30-22.1.30-2.12.1.30-2.1build1	2.1.30-2.1ubuntu0.1

History

History
Recorded	Changed	Sources
Nov 6, 2026	affected, facts
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2023-26916 is a medium vulnerability (CVSS 5.3) in Cesnet Libyang, published April 3, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.99%, the 62nd percentile. Fixed in libyang 2.1.55-1.

References

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