CVE-2026-84444 (GCVE-0-2026-84444)

Vulnerability from cvelistv5 – Published: 2026-09-18 15:56 – Updated: 2026-09-22 14:50
VLAI
Title
libheif uncompressed tiled image encoding allows out-of-bounds write
Summary
libheif is a HEIF and AVIF file format decoder and encoder. Prior to 1.23.2, when WITH_UNCOMPRESSED_CODEC is enabled, heif_context_add_image_tile() accepts an independently constructed tile whose component-plane dimensions do not match the tile geometry established by the prototype image. ImageItem_uncompressed::add_image_tile() passes that tile directly to unc_encoder::encode_tile(), which lacked the check_component_sizes() gate and sizes its output from the configured tile geometry while copying the tile's actual component-plane dimensions. An oversized component plane can therefore make unc_encoder_component_interleave::encode_tile() copy attacker-controlled data beyond the heap output buffer. This issue is fixed in version 1.23.2.
Severity
7.4 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-22 14:50 UTC
CWE
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 8026 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
strukturag libheif Affected: < 1.23.2
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

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