CVE-2026-80537 | Linux Kernel up to 6.18.45/7.1.9 XFS xfs_btree.c xfs_rtrefcountbt_verify m_rtrefc_maxlevels off-by-one

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A vulnerability marked as critical has been reported in Linux Kernel up to 6.18.45/7.1.9. This impacts the function xfs_rtrefcountbt_verify of the file fs/xfs/libxfs/xfs_btree.c of the component XFS. This manipulation of the argument m_rtrefc_maxlevels causes off-by-one.

This vulnerability appears as CVE-2026-80537. The attack requires local access. There is no available exploit.

It is suggested to upgrade the affected component.VulDB Recent EntriesRead More