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CVE-2025-0684 is an integer-overflow vulnerability in GRUB2's ReiserFS filesystem module. During symbolic-link lookup, the module derives internal buffer sizes from filesystem-geometry parameters controlled by the filesystem but does not properly check for integer overflow. A crafted ReiserFS filesystem can cause an undersized allocation and subsequently pass an overflowed length to the ReiserFS data-reading routine, resulting in a heap-based out-of-bounds write.
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No public exploit code observed for this vulnerability.
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4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability addressed by the EulerOS SA-2026-3507 GRUB2 package update.
A vulnerability addressed by the EulerOS SA-2026-3420 security update affecting listed GRUB2 packages.
A GRUB2 reiserfs symlink handling integer overflow that can cause heap out-of-bounds write during reads and may enable arbitrary code execution.
A GRUB reiserfs symlink handling integer overflow that can cause heap-based out-of-bounds writes during reads and may enable arbitrary code execution.
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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.