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SRC: CVELISTV5 / SYNC: T-2M / LAG: 16M / REC: 386,288 / REV: C6-1C / V4

01 RecordSTATE: PUBLISHED

CVE-2023-4091

Samba: smb clients can truncate files with read-only permissions

MediumPUBLISHEDCNA: redhat

CNA base score6.5 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

02 Description

CNA: redhat

Samba: smb clients can truncate files with read-only permissions

03 Exploitation and scoring

SRC: CISA, FIRST, NVD, RED HAT

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

1.17% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 65.3% of scored records. A rank, not a probability.

NVD base score

6.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

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

SCHEMA: 5.2

Published

2023-11-03 07:56Z2 YR AGO

Last updated

2025-11-20 18:27Z9 MO AGO

Reserved

2023-08-02

Assigning CNA

redhat

Record state

PUBLISHED

Severity

Medium (CVSS 6.5)

CNA CVSS vector

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

Weaknesses

CWE-276Incorrect Default PermissionsBase

Data version

5.2

Document digest

46dbea945b76ddec36b69b686a3d07996f2513b8122523c2eff2190b20de363e

05 Affected products

PAIRS: 10

VendorProductVersionsPlatforms

Red HatRed Hat Enterprise Linux 8Not specified—

Red HatRed Hat Enterprise Linux 8.6 Extended Update SupportNot specified—

Red HatRed Hat Enterprise Linux 8.8 Extended Update SupportNot specified—

Red HatRed Hat Enterprise Linux 9Not specified—

Red HatRed Hat Enterprise Linux 9.0 Extended Update SupportNot specified—

Red HatRed Hat Enterprise Linux 9.2 Extended Update SupportNot specified—

Red HatRed Hat Virtualization 4 for Red Hat Enterprise Linux 8Not specified—

Red HatRed Hat Enterprise Linux 6Not specified—

Red HatRed Hat Enterprise Linux 7Not specified—

Red HatRed Hat Storage 3Not specified—

06 References

REFS: 13

access.redhat.comRHSA-2023:6209https://access.redhat.com/errata/RHSA-2023:6209vendor-advisoryx_refsource_REDHAT
access.redhat.comRHSA-2023:6744https://access.redhat.com/errata/RHSA-2023:6744vendor-advisoryx_refsource_REDHAT
access.redhat.comRHSA-2023:7371https://access.redhat.com/errata/RHSA-2023:7371vendor-advisoryx_refsource_REDHAT
access.redhat.comRHSA-2023:7408https://access.redhat.com/errata/RHSA-2023:7408vendor-advisoryx_refsource_REDHAT
access.redhat.comRHSA-2023:7464https://access.redhat.com/errata/RHSA-2023:7464vendor-advisoryx_refsource_REDHAT
access.redhat.comRHSA-2023:7467https://access.redhat.com/errata/RHSA-2023:7467vendor-advisoryx_refsource_REDHAT
access.redhat.comhttps://access.redhat.com/security/cve/CVE-2023-4091vdb-entryx_refsource_REDHAT
bugzilla.redhat.comRHBZ#2241882https://bugzilla.redhat.com/show_bug.cgi?id=2241882issue-trackingx_refsource_REDHAT
bugzilla.samba.orghttps://bugzilla.samba.org/show_bug.cgi?id=15439
www.samba.orghttps://www.samba.org/samba/security/CVE-2023-4091.html
lists.debian.orghttps://lists.debian.org/debian-lts-announce/2024/04/msg00015.html
lists.fedoraproject.orghttps://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZUMVALLFFDFC53JZMUWA6HPD7HUGAP5I/
security.netapp.comhttps://security.netapp.com/advisory/ntap-20231124-0002/