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CVE-2022-27239

26
FAUCET Score

CVE-2022-27239 is a stack-based buffer overflow vulnerability in cifs-utils versions up to 6.14, specifically when parsing the mount.cifs ip= command-line argument. This flaw affects various Linux distributions and related Samba components. With a CVSS score of 7.8 (High), it allows local attackers to achieve root privileges with low attack complexity and no user interaction required, leading to high impact on confidentiality, integrity, and availability. Currently, there is no known active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 6.15CPE matchmatch criteria
cpe:2.3:a:samba:cifs-utils:*:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
10.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
11.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
4.0CPE matchmatch criteria
cpe:2.3:a:suse:caas_platform:4.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.56%
Probability of exploitation in next 30 days
EPSS Percentile
43.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0056 is in the 82nd percentile among its peer group of 16,994 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (12)

github_advisorypatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: 18733-16820Fixed in: 6.8-6
microsoftpatch availablevia msrc
Product: 18734-16823Fixed in: 6.14-2
microsoftpatch availablevia msrc
Product: cbl2 cifs-utils 6.14-2 on CBL Mariner 2.0Fixed in: 6.14-2
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 x64Fixed in: 6.14-2
microsoftpatch availablevia msrc
Product: CBL Mariner 2.0 ARMFixed in: 6.14-2
microsoftpatch availablevia msrc
Product: cm1 cifs-utils 6.8-6 on CBL Mariner 1.0Fixed in: 6.8-6
microsoftpatch availablevia msrc
Product: CBL Mariner 1.0 x64Fixed in: 6.8-6
microsoftpatch availablevia msrc
Product: CBL Mariner 1.0 ARMFixed in: 6.8-6
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: cifs-utils-0:7.0-1.el8
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: cifs-utils
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: cifs-utils

Vendor Advisories (3)

microsoft2022-May/CVE-2022-27239

CVE-2022-27239

May 10, 2022
redhatCVE-2022-27239Moderate

cifs-utils: stack-based buffer overflow mount.cifs may lead to local privilege escalation to root

Apr 27, 2022
microsoft2022-Apr/CVE-2022-27239Important

In cifs-utils through 6.14 a stack-based buffer overflow when parsing the mount.cifs ip= command-line argument could lead to local attackers gaining root privileges.

Apr 12, 2022

References

bugzilla.samba.org / show_bug.cgi
Issue TrackingPermissions RequiredVendor Advisory
bugzilla.suse.com / show_bug.cgi
Issue TrackingPatchThird Party Advisory
github.com / piastry/cifs-utils/pull/7
Issue TrackingPatchThird Party Advisory
github.com / piastry/cifs-utils/pull/7/commits/955fb147e97a6a74e1aaa65766de91e2c1479765
PatchThird Party Advisory
lists.debian.org / debian-lts-announce/2022/05/msg00020.html
Mailing ListThird Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/5WBOLMANBYJILXQKRRK7OCR774PXJAYY
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/HXKZLJYJJEC3TIBFLXUORRMZUKG5W676
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/QIYZ4L6SLSYJQ446VJAO2VGAESURQNSP
security.gentoo.org / glsa/202311-05
debian.org / security/2022/dsa-5157
Third Party Advisory
wiki.robotz.com / index.php/Linux_CIFS_Utils_and_Samba
Third Party Advisory