7.5

CVE-2025-43966: struktur libheif NULL Pointer Dereference

CVSS: 7.5v3.1HighAnalyzed
AliasesUBUNTU-CVE-2025-43966DEBIAN-CVE-2025-43966
Published 20-04-2025Last modified 21-04-2025
Open JSON

Vulnerability summary

CVE-2025-43966 is a high (CVSS 7.5) NULL Pointer Dereference vulnerability in struktur libheif. EPSS estimates a 0.31% chance of exploitation in the next 30 days, higher than 22.7% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
0.31%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 20-04-2025
    PublishedVulnerability first disclosed.
  2. 21-04-2025
    Last modifiedVulnerability information updated.

Description

libheif before 1.19.6 has a NULL pointer dereference in ImageItem_iden in image-items/iden.cc.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.31%

Chance of exploitation in the next 30 days

Percentile

23%

Versus all other CVEs

30-day change

0.00 pp

From 0.31% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.31%

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

Debian1 product
  • libheif< 1.19.7-1
Struktur1 product
Ubuntu1 product
  • libheif< 1.19.7-1

3 vendors · 3 products

References

5 links