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A vulnerability in the Linux kernel XFS filesystem affects attribute leaf block handling during insertion of extended attributes. In the XFS attribute leaf code, freemap metadata was not fully adjusted as the leaf entries array grew, allowing tracked free space to overlap the entries array. This inconsistency could cause the computed name area to begin below the end of the entries array, violating internal leaf block invariants and triggering an assertion in the freemap adjustment path. The issue was observed in xfs_attr3_leaf_add_work within fs/xfs/libxfs/xfs_attr_leaf.c during repeated local extended attribute operations that create a specific leaf layout. The flaw has existed since Linux 2.6.12. The upstream fix adjusts all freemap entries to ensure they cannot collide with the entries array, and depends on earlier XFS fixes related to freemap size underflow handling and zero-length freemap entry normalization.
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23 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Linux kernel XFS vulnerability involving incorrect freemap adjustments when adding extended attributes to leaf blocks.
A Linux kernel XFS vulnerability involving freemap adjustments when adding xattrs to leaf blocks.
A Linux kernel XFS vulnerability involving incorrect freemap adjustments when adding extended attributes to leaf blocks.
A Linux kernel XFS vulnerability involving freemap adjustments when adding extended attributes to leaf blocks.
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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.
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