Description
mount.cifs in cifs-utils 2.6 allows local users to determine the existence of arbitrary files or directories via the file path in the second argument, which reveals their existence in an error message.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | cifs-utils | 2:5.3-2 | — |
| Debian 13 | cifs-utils | 2:5.3-2 | — |
| Debian 12 | cifs-utils | 2:5.3-2 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 6 | cifs-utils | 4.8.1-10.el6 | RHSA-2012:0902 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | cifs-utils | 6.5-1.5 | openSUSE-SU-2024:10334-1 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Exploit-DB 1
- mount.cifs - 'chdir()' Arbitrary Root File Identification EDB-18783 · local · Apr 25, 2012 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 2
- RHSA-2012:0902 Red Hat Security Advisory: cifs-utils security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- openSUSE-SU-2024:10334-1 cifs-utils-6.5-1.5 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026