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Oracle Linux: CVE-2016-6197: ELSA-2016-3587: kernel-uek security update (IMPORTANT)

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Oracle Linux: CVE-2016-6197: ELSA-2016-3587: kernel-uek security update (IMPORTANT)

Severity
5
CVSS
(AV:L/AC:L/Au:S/C:N/I:N/A:C)
Published
07/11/2016
Created
07/25/2018
Added
08/06/2016
Modified
07/22/2024

Description

fs/overlayfs/dir.c in the OverlayFS filesystem implementation in the Linux kernel before 4.6 does not properly verify the upper dentry before proceeding with unlink and rename system-call processing, which allows local users to cause a denial of service (system crash) via a rename system call that specifies a self-hardlink. It was found that the unlink and rename functionality in overlayfs did not verify the upper dentry for staleness. A local, unprivileged user could use the rename syscall on overlayfs on top of xfs to panic or crash the system.

Solution(s)

  • oracle-linux-upgrade-kernel-uek

References

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