CVE-2019-15538

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Summary:

An issue was discovered in xfs_setattr_nonsize in fs/xfs/xfs_iops.c in the Linux kernel through 5.2.9. XFS partially wedges when a chgrp fails on account of being out of disk quota. xfs_setattr_nonsize is failing to unlock the ILOCK after the xfs_qm_vop_chown_reserve call fails. This is primarily a local DoS attack vector, but it might result as well in remote DoS if the XFS filesystem is exported for instance via NFS.

Reference Links(if available):

  • https://lore.kernel.org/linux-xfs/[email protected]/
  • https://lore.kernel.org/linux-xfs/[email protected]
  • https://github.com/torvalds/linux/commit/1fb254aa983bf190cfd685d40c64a480a9bafaee
  • https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1fb254aa983bf190cfd685d40c64a480a9bafaee
  • https://lists.fedoraproject.org/archives/list/[email protected]/message/T4JZ6AEUKFWBHQAROGMQARJ274PQP2QP/
  • CVSS Score (if available)

    v2: / MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:C

    v3: / HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

    Links to Exploits(if available)