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A heap out-of-bounds write may heppen during the handling of Huffman tables in the PNG reader. This may lead to data corruption in the heap space. Confidentiality Integrity and Availablity impact may be considered Low as it's very complex to an attacker control the encoding and positioning of corrupted Huffman entries to achieve results such as arbitrary code execution and/or secure boot circumvention. This flaw affects grub2 versions prior grub-2.12.
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19 Feb 2026 09:01Current
6.5Medium risk
Vulners AI Score6.5
CVSS 3.14.5
CVSS 26.9
EPSS0.00114