ext4 xattr

About this tag
The ext4 xattr tag covers discussions about extended attributes (xattrs) on the ext4 filesystem, particularly in the context of Linux kernel security. Recent content focuses on CVE-2025-22121, an out-of-bounds read vulnerability in the ext4 xattr cleanup path (ext4_xattr_inode_dec_ref_all). This bug affects Linux systems and is relevant to Azure Linux, as Microsoft's advisory notes that Azure Linux includes the open-source component and may be affected. The tag includes technical details of the vulnerability, its impact, and references to upstream fixes and independent trackers like NVD, Ubuntu, and Oracle.

  1. CVE-2025-22121: Linux ext4 xattr bug and Azure Linux attestation explained

    The Linux kernel fix tracked as CVE-2025-22121 patches an out‑of‑bounds read in the ext4 xattr cleanup path (ext4_xattr_inode_dec_ref_all, and Microsoft’s public advisory explicitly states that Azure Linux includes the open‑source component and is therefore potentially affected — but that...
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    • azure linux ext4 xattr linux kernel vulnerability
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