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5.5
CVSSv3

CVE-2016-6198

Published: 06/08/2016 Updated: 27/12/2019
CVSS v2 Base Score: 4.9 | Impact Score: 6.9 | Exploitability Score: 3.9
CVSS v3 Base Score: 5.5 | Impact Score: 3.6 | Exploitability Score: 1.8
VMScore: 436
Vector: AV:L/AC:L/Au:N/C:N/I:N/A:C
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Vulnerability Summary

The filesystem layer in the Linux kernel prior to 4.5.5 proceeds with post-rename operations after an OverlayFS file is renamed to a self-hardlink, which allows local users to cause a denial of service (system crash) via a rename system call, related to fs/namei.c and fs/open.c.

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Vendor Advisories

Red Hat: Important: kernel security, bug fix, and enhancement update
Synopsis Important: kernel security, bug fix, and enhancement update Type/Severity Security Advisory: Important Topic An update for kernel is now available for Red Hat Enterprise Linux 7Red Hat Product Security has rated this update as having a security impact of Important A Common Vulnerability Scoring S ...
Red Hat: Important: kernel-rt security and bug fix update
Synopsis Important: kernel-rt security and bug fix update Type/Severity Security Advisory: Important Topic An update for kernel-rt is now available for Red Hat Enterprise Linux 7Red Hat Product Security has rated this update as having a security impact of Important A Common Vulnerability Scoring System (C ...
Red Hat: CVE-2016-6198
A flaw was found that the vfs_rename() function did not detect hard links on overlayfs A local, unprivileged user could use the rename syscall on overlayfs on top of xfs to crash the system ...

References

CWE-284http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=54d5ca871e72f2bb172ec9323497f01cd5091ec7https://github.com/torvalds/linux/commit/54d5ca871e72f2bb172ec9323497f01cd5091ec7http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.5.5https://bugzilla.redhat.com/show_bug.cgi?id=1355654https://github.com/torvalds/linux/commit/9409e22acdfc9153f88d9b1ed2bd2a5b34d2d3cahttp://www.openwall.com/lists/oss-security/2016/07/11/8http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9409e22acdfc9153f88d9b1ed2bd2a5b34d2d3cahttp://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.htmlhttp://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.htmlhttp://www.securityfocus.com/bid/91709http://www.securitytracker.com/id/1036273http://rhn.redhat.com/errata/RHSA-2016-2584.htmlhttp://rhn.redhat.com/errata/RHSA-2016-2574.htmlhttp://rhn.redhat.com/errata/RHSA-2016-1875.htmlhttp://rhn.redhat.com/errata/RHSA-2016-1847.htmlhttps://nvd.nist.govhttps://access.redhat.com/errata/RHSA-2016:2574https://access.redhat.com/security/cve/cve-2016-6198
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