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 system-call processing,
02 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,
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 0.50% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 42.8% of scored records. A rank, not a probability.
- NVD base score
- 5.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Moderate. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2016-08-06 20:00Z10 YR AGO
- Last updated
- 2024-08-06 01:22Z2 YR AGO
- Reserved
- 2016-07-11
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- Data version
- 5.1
- Document digest
- 8230f23f8e30aa9a8f46eb93317f3c3a31eeb2ce10546da7dbd1b76a8b966d60
05 Affected products
06 References
- www.oracle.comhttp://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
- www.ubuntu.comUSN-3070-1http://www.ubuntu.com/usn/USN-3070-1
- bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=1355650
- git.kernel.orghttp://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=11f3710417d026ea2f4fcf362d866342c5274185
- www.oracle.comhttp://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html
- rhn.redhat.comRHSA-2016:1847http://rhn.redhat.com/errata/RHSA-2016-1847.html
- www.securityfocus.com91709http://www.securityfocus.com/bid/91709
- rhn.redhat.comRHSA-2016:1875http://rhn.redhat.com/errata/RHSA-2016-1875.html
- www.ubuntu.comUSN-3070-3http://www.ubuntu.com/usn/USN-3070-3
- www.securitytracker.com1036273http://www.securitytracker.com/id/1036273
- www.ubuntu.comUSN-3070-2http://www.ubuntu.com/usn/USN-3070-2
- github.comhttps://github.com/torvalds/linux/commit/11f3710417d026ea2f4fcf362d866342c5274185
- www.openwall.com[oss-security] 20160711 Re: cvs request: local DoS using rename syscall on overlayfs on top of xfs to crash the kernel - Linux kernelhttp://www.openwall.com/lists/oss-security/2016/07/11/8
- www.ubuntu.comUSN-3070-4http://www.ubuntu.com/usn/USN-3070-4
07 Fixed in
Debian 12
- linux Fixed in 4.6.1-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- linux Fixed in 4.6.1-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- linux Fixed in 4.6.1-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 14.04 LTS
- linux-lts-xenial Fixed in 4.4.0-36.55~14.04.1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- linux Fixed in 4.4.0-36.55
- linux-raspi2 Fixed in 4.4.0-1021.27
- linux-snapdragon Fixed in 4.4.0-1024.27
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 20.04 LTS
- linux-azure-fde No fix yet
- linux-gke No fix yet
- linux-gkeop No fix yet
- linux-gkeop-5.15 No fix yet
- linux-raspi2 No fix yet
- linux-riscv No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 22.04 LTS
- linux-intel-iot-realtime No fix yet
- linux-realtime No fix yet
- linux-riscv No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 24.04 LTS
- linux-azure-6.11 No fix yet
- linux-gcp-6.11 No fix yet
- linux-hwe-6.11 No fix yet
- linux-lowlatency-hwe-6.11 No fix yet
- linux-raspi-realtime No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 14.04 LTS
- linux No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 20.04 LTS
- linux-azure-fde-5.15 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.