Medium severity · published Aug 6, 2016
CVE-2016-6197
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…
5.5
CVSS
0.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 43% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
through 4.5.7 · source: NVD
LI
Linux · Oracle
6 · source: NVD
VS
VM Server · Oracle
3.4 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2016-6197
CVE.org
https://www.cve.org/CVERecord?id=CVE-2016-6197
Issue Tracking
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=11f3710417d026ea2f4fcf362d866342c5274185
rhn.redhat.com
http://rhn.redhat.com/errata/RHSA-2016-1847.html
rhn.redhat.com
http://rhn.redhat.com/errata/RHSA-2016-1875.html
Mailing List
http://www.openwall.com/lists/oss-security/2016/07/11/8
Third Party Advisory
http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html
Vendor Advisory
http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
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