Medium 6.9Published Jul 21, 2026

CVE-2026-47709libheif has a NULL pointer dereference in heif_image_handle_get_image_tiling for malformed unci image missing ispe

Updated under an hour ago (Oct 26, 2026, 8:50 AM ET)

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Every CVE for strukturag libheif

Exploited in the last 30 days

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: 6.9 MEDIUM (v4.0, CNA)CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Weakness (CWE): CWE-476
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Jul 22, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

strukturag libheif strukturag:libheif (from the name)	before 1.22.0	CNA record
struktur libheif struktur:libheif	before 1.22.0	NVD

References

https://github.com/strukturag/libheif/security/advisories/GHSA-4h72-vqgp-9376x-refsource-confirm, exploit, vendor-advisory, mitigation
https://github.com/strukturag/libheif/issues/1802x-refsource-misc, exploit, issue-tracking, third-party-advisory
https://github.com/strukturag/libheif/pull/1806x-refsource-misc, exploit, issue-tracking, patch, third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.