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CVE-2026-20884 is an integer-overflow vulnerability in LibRaw's deflate_dng_load_raw functionality, present in code identified as commit 8dc68e2. Malformed size values in a specially crafted float/deflated DNG image can overflow during data-size calculation, resulting in an undersized heap allocation followed by a heap buffer overflow during image processing. LibRaw 0.22.1 corrects the data-size calculation overflow and adds read-result validation.
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No public exploit code observed for this vulnerability.
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A critical integer overflow in LibRaw's deflate_dng_load_raw functionality can cause a heap buffer overflow when processing an attacker-supplied malicious file. The reference assigns a CVSS v3 base score of 9.8 and reports that exploits are available. The prescribed fix is to update libraw and related packages to version 0.21.4-2+e4 or later.
A vulnerability addressed by Fedora advisory FEDORA-2026-8a0b0bba30 affecting the darktable package on Fedora 45; no technical flaw details are provided.
A vulnerability addressed by the Fedora 44 darktable update. The content provides no technical flaw description or impact specific to this CVE.
An integer-overflow vulnerability in LibRaw's deflate_dng_load_raw function that can enable arbitrary code execution in darktable.
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Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.