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CVE-2025-22121 is an out-of-bounds read vulnerability in the Linux kernel ext4 filesystem implementation. ext4_xattr_delete_inode() processes inode-resident extended attributes without adequately validating them, allowing ext4_xattr_inode_dec_ref_all() to read invalid memory during extended-attribute reference cleanup. A KASAN diagnostic identifies a four-byte read from freed memory, with the failure occurring through inode eviction and orphan cleanup during filesystem mounting. The fix validates inode-resident extended attributes using xattr_check_inode(), centralizing verification in ext4_iget_extra_inode().
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A Linux kernel ext4 vulnerability causes an out-of-bounds read in ext4_xattr_inode_dec_ref_all() because inode extended attributes are not properly validated. The diagnostic trace reports a KASAN use-after-free during filesystem mounting and orphan cleanup. The fix validates extended attributes in ext4_iget_extra_inode(). The advisory assigns a CVSS v3 base score of 7.1, with local access and low privileges required, and high confidentiality and availability impacts.
An out-of-bounds read vulnerability in the Linux kernel ext4 function ext4_xattr_inode_dec_ref_all(), affecting Rocky Linux 9 kernel packages covered by CIQ advisory crlsa-2025_11861.
A high-severity local Linux kernel ext4 filesystem vulnerability involving improper validation of inode-resident extended attributes, resulting in an out-of-bounds read/use-after-free condition during xattr inode cleanup.
A high-severity local Linux kernel ext4 filesystem vulnerability involving invalid extended-attribute handling that can result in out-of-bounds memory access/use-after-free behavior during inode cleanup or mounting of a crafted ext4 filesystem.
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Cross-references every affected SKU, including bundled OEM variants.
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