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Amazon Linux AMI: CVE-2019-15538: Security patch for kernel (ALAS-2019-1281)

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Amazon Linux AMI: CVE-2019-15538: Security patch for kernel (ALAS-2019-1281)

Severity
8
CVSS
(AV:N/AC:L/Au:N/C:N/I:N/A:C)
Published
08/25/2019
Created
09/21/2019
Added
09/19/2019
Modified
08/25/2020

Description

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.

Solution(s)

  • amazon-linux-upgrade-kernel

References

  • ALAS-2019-1281
  • USN-4144-1
  • USN-4147-1
  • CVE-2019-15538

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