7.5

CVE-2026-84447: strukturag libheif

CVSS: 7.5v3.1HighDeferred
AliasesUBUNTU-CVE-2026-84447DEBIAN-CVE-2026-84447
Published 18-09-2026Last modified 18-09-2026
Open JSON

Vulnerability summary

CVE-2026-84447 is a high (CVSS 7.5) vulnerability in strukturag libheif. EPSS estimates a 0.52% chance of exploitation in the next 30 days, higher than 42.8% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.52%
0%100%
Low · -0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 4 · Related 4
OPENSUSE-SU-2026:11719-1OPENSUSE-SU-2026:21889-1SUSE-SU-2026:4276-1USN-8846-1

Timeline

  1. 18-09-2026
    PublishedVulnerability first disclosed.
  2. 18-09-2026
    Last modifiedVulnerability information updated.

Description

libheif is a HEIF and AVIF file format decoder and encoder. In 1.23.1 and earlier, crafted grid, iovl, and iden reference graphs can repeatedly decode the same base image because processed_ids is copied per branch and ImageItem::decode_image() has no shared operation budget. This vulnerability is fixed in 1.23.2.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.52%

Chance of exploitation in the next 30 days

Percentile

43%

Versus all other CVEs

30-day change

-0.01 pp

From 0.52% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.52%

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
  • libheifAll versions (No fix recorded) | < 1.23.4-1~deb13u1 | < 1.23.2-1
Strukturag1 product
Ubuntu1 product
  • libheif< 1.1.0-2ubuntu0.1~esm5 | < 1.6.1-1ubuntu0.1~esm5 | < 1.12.0-2ubuntu0.1~esm5 | < 1.17.6-1ubuntu4.9 | All versions (No fix recorded) | < 1.21.2-3ubuntu0.6

3 vendors · 3 products

References

7 links