5.3

CVE-2023-26916: cesnet libyang NULL Pointer Dereference

CVSS: 5.3v3.1MediumModified
AliasesUBUNTU-CVE-2023-26916DEBIAN-CVE-2023-26916
Published 03-04-2023Last modified 18-02-2025
Open JSON

Vulnerability summary

CVE-2023-26916 is a medium (CVSS 5.3) NULL Pointer Dereference vulnerability in cesnet libyang. EPSS estimates a 0.99% chance of exploitation in the next 30 days, higher than 61.8% of scored vulnerabilities.

Overall risk
21/100
0100
Low · default modelHow is this calculated?
CVSS score
5.3/10
010
Medium · v3.1 (NVD)
EPSS score
0.99%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
USN-7752-1

Timeline

  1. 03-04-2023
    PublishedVulnerability first disclosed.
  2. 18-02-2025
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.99%

Chance of exploitation in the next 30 days

Percentile

62%

Versus all other CVEs

30-day change

0.00 pp

From 0.99% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.99%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian2 products
  • libyang< 3.4.2+dfsg-2
  • libyang2All versions (No fix recorded)
Cesnet1 product
Fedoraproject1 product
Ubuntu1 product
  • libyang2< 2.1.30-2.1ubuntu0.1

4 vendors · 5 products

References

8 links