What is CVE-2023-26916?

CVE-2023-26916 is a medium-severity vulnerability in Cesnet Libyang, classified under NULL Pointer Dereference. CVSS score: 5.3/10. Published 2023-04-03.

How severe is CVE-2023-26916?

Medium severity. CVSS v3 base score is 5.3 out of 10.

NULL pointer dereference in Cesnet Libyang

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.

Published 2023-04-03 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

EPSS exploit prediction

EPSS: 0.010 (60.9th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 61st percentile — 60.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Cesnet Libyang
Fedoraproject Fedora — versions 36, 37

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

github.com/CESNET/libyang/issues/1979 (Third Party Advisory, Issue Tracking)
lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)

Frequently asked questions

What is CVE-2023-26916?: CVE-2023-26916 is a medium-severity vulnerability in Cesnet Libyang, classified under NULL Pointer Dereference. CVSS score: 5.3/10. Published 2023-04-03.
How severe is CVE-2023-26916?: Medium severity. CVSS v3 base score is 5.3 out of 10.