6.9

CVE-2026-47709: struktur libheif NULL Pointer Dereference

CVSS: 6.9v4.0MediumAnalyzed
AliasesUBUNTU-CVE-2026-47709DEBIAN-CVE-2026-47709
Published 21-07-2026Last modified 22-07-2026
Open JSON

Vulnerability summary

CVE-2026-47709 is a medium (CVSS 6.9) NULL Pointer Dereference vulnerability in struktur libheif. EPSS estimates a 0.18% chance of exploitation in the next 30 days, higher than 7.3% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
38/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.9/10
010
Medium · v4.0 (CVE.org)
EPSS score
0.18%
0%100%
Low · -0.03 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github

Advisory lineage

Upstream 0 · Downstream 4 · Related 6
OPENSUSE-SU-2026:10878-1OPENSUSE-SU-2026:20974-1SUSE-SU-2026:22153-1SUSE-SU-2026:2622-1USN-8526-1USN-8526-2

Timeline

  1. 21-07-2026
    PublishedVulnerability first disclosed.
  2. 22-07-2026
    Last modifiedVulnerability information updated.

Description

libheif is a HEIF and AVIF file format decoder and encoder. Versions prior to 1.22.0 crashes in the public C API `heif_image_handle_get_image_tiling()` when a malformed uncompressed HEIF image item has an associated `uncC` property but no associated `ispe` property. In debug builds this trips the `ispe && uncC` assertion in `ImageItem_uncompressed::get_heif_image_tiling()`. In a release/NDEBUG ASan build, the same file causes a null pointer read at address `0xa8`. Version 1.22.0 fixes the issue.

CVSS metrics

6 scores · 4 sources · 2 versions

EPSS trend

Probability

0.18%

Chance of exploitation in the next 30 days

Percentile

7%

Versus all other CVEs

30-day change

-0.03 pp

From 0.21% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.18%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • githubUnverified

    Libheif

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • libheifAll versions (No fix recorded) | < 1.19.8-1+deb13u1 | < 1.23.1-1
Struktur1 product
Strukturag1 product
Ubuntu1 product
  • libheif< 1.17.6-1ubuntu4.6 | < 1.20.2-1ubuntu0.6 | < 1.21.2-3ubuntu0.3

4 vendors · 4 products

References

8 links