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CVE-2026-25794 is an integer-overflow-driven heap memory corruption vulnerability in ImageMagick affecting versions prior to 7.1.2-15. The flaw is in the WriteUHDRImage routine in coders/uhdr.c, where 32-bit int arithmetic is used to calculate the size of a pixel buffer during UHDR image writing. For sufficiently large image dimensions, the multiplication overflows, producing a smaller-than-required allocation size. Subsequent writes then exceed the allocated heap buffer, resulting in an out-of-bounds heap write. The issue can cause process termination and may be exploitable for broader memory corruption effects depending on runtime conditions.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
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No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
7 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.