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CVE-2026-1933

31
FAUCET Score

A flaw was found in Samba’s handling of NTFS-style reparse points on shares configured with read only = yes. Due to missing SMB-layer access checks, authenticated users with underlying filesystem write permissions may create or delete reparse point metadata through SMB operations even on read-only exports. This could allow modification of SMB-visible file behavior, including converting files into symbolic links or other reparse point types.

First published: May 27, 2026Last modified: Jul 2, 2026

Impacted Technologies

VendorProductVersion(s)CPE
4.0CPE matchmatch criteria
cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:*
>= 4.1.0, < 4.2.2CPE matchmatch criteria
cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.1HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
LOW
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
4.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.86%
Probability of exploitation in next 30 days
EPSS Percentile
54.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0086 is in the 50th percentile among its peer group of 17,844 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 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 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

ubuntupatch availablevia ubuntu_usn
Product: samba (jammy)Fixed in: 2:4.15.13+dfsg-0ubuntu1.12
ubuntupatch availablevia ubuntu_usn
Product: samba (noble)Fixed in: 2:4.19.5+dfsg-4ubuntu9.6
ubuntupatch availablevia ubuntu_usn
Product: samba (questing)Fixed in: 2:4.22.3+dfsg-4ubuntu2.4
ubuntupatch availablevia ubuntu_usn
Product: samba (resolute)Fixed in: 2:4.23.6+dfsg-1ubuntu2.1

Vendor Advisories (1)

ubuntuUSN-8306-1

Samba vulnerabilities

May 26, 2026

References

security.access.redhat.com / data/csaf/v2/vex/2026/cve-2026-1933.json
access.redhat.com / errata/RHSA-2026:22644
access.redhat.com / errata/RHSA-2026:22963
access.redhat.com / errata/RHSA-2026:25049
access.redhat.com / errata/RHSA-2026:25979
access.redhat.com / errata/RHSA-2026:28053
access.redhat.com / errata/RHSA-2026:28054
access.redhat.com / errata/RHSA-2026:28055
access.redhat.com / errata/RHSA-2026:28056
access.redhat.com / errata/RHSA-2026:28057
access.redhat.com / errata/RHSA-2026:29863
access.redhat.com / security/cve/CVE-2026-1933
Third Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingThird Party Advisory
bugzilla.samba.org / show_bug.cgi
Issue TrackingVendor Advisory