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CVE-2026-32741 is a heap-based buffer overflow in libheif versions through 1.21.2 in MaskImageCodec::decode_mask_image(). While decoding a HEIF file containing a mask image, the vulnerable path copies the complete item-location (iloc) extent into a pixel buffer with memcpy. The copy length is derived from attacker-controlled extent data, whereas the destination allocation is calculated from the declared image dimensions. The absence of a check that constrains extent length to the allocated pixel-buffer size permits a crafted HEIF image to overflow the heap.
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No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
6 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.