synced 5 MIN AGO
01 Record

CVE-2021-20316

A flaw was found in the way Samba handled file/directory metadata. This flaw allows an authenticated attacker with permissions to read or modify share metadata, to perform this operation outside of

UnratedPUBLISHEDCNA: redhat
CNA base scoreUnratedNo CNA CVSS vector
View raw JSON

02 Description

A flaw was found in the way Samba handled file/directory metadata. This flaw allows an authenticated attacker with permissions to read or modify share metadata, to perform this operation outside of

03 Exploitation and scoring

Exploitation
Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision
Not assessed by CISA
EPSS probability
1.04% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 63.4% of scored records. A rank, not a probability.
NVD base score
6.8 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/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

Published
2022-08-23 00:00Z4 YR AGO
Last updated
2024-08-03 17:37Z2 YR AGO
Reserved
2020-12-17
Assigning CNA
redhat
Record state
PUBLISHED
Severity
Not rated by the issuing CNA
CNA CVSS vector
Not published by the issuing CNA
Weaknesses
  • CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')Class
Data version
5.1
Document digest
d3e35e4232b918b08e0a6d92a6e9018bc0ed26d36f0ef5de70c1b760c8912a48

05 Affected products

VendorProductVersionsPlatforms
n/asambaAffects samba file server before v4.15.0, Fixed in samba v4.15.0—

06 References

07 Fixed in

AlmaLinux 8

  • ctdb
    Fixed in 4.15.5-5.el8
  • libsmbclient
    Fixed in 4.15.5-5.el8
  • libsmbclient-devel
    Fixed in 4.15.5-5.el8
  • libwbclient
    Fixed in 4.15.5-5.el8
  • libwbclient-devel
    Fixed

    A version is affected if any line below covers it.

    • Affected before 4.15.5-5.el8
    • Affected before 4.15.5-8.el8_6
  • python3-samba
    Fixed in 4.15.5-5.el8
  • python3-samba-test
    Fixed in 4.15.5-5.el8
  • samba
    Fixed in 4.15.5-5.el8
  • samba-client
    Fixed in 4.15.5-5.el8
  • samba-client-libs
    Fixed in 4.15.5-5.el8
  • samba-common
    Fixed in 4.15.5-5.el8
  • samba-common-libs
    Fixed in 4.15.5-5.el8
  • samba-common-tools
    Fixed in 4.15.5-5.el8
  • samba-devel
    Fixed in 4.15.5-5.el8
  • samba-krb5-printing
    Fixed in 4.15.5-5.el8
  • samba-libs
    Fixed in 4.15.5-5.el8
  • samba-pidl
    Fixed in 4.15.5-5.el8
  • samba-test
    Fixed in 4.15.5-5.el8
  • samba-test-libs
    Fixed in 4.15.5-5.el8
  • samba-vfs-iouring
    Fixed in 4.15.5-5.el8
  • samba-winbind
    Fixed in 4.15.5-5.el8
  • samba-winbind-clients
    Fixed in 4.15.5-5.el8
  • samba-winbind-krb5-locator
    Fixed in 4.15.5-5.el8
  • samba-winbind-modules
    Fixed in 4.15.5-5.el8
  • samba-winexe
    Fixed in 4.15.5-5.el8

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 8

  • ctdb
    Fixed in 4.15.5-5.el8
  • libsmbclient
    Fixed in 4.15.5-5.el8
  • libsmbclient-devel
    Fixed in 4.15.5-5.el8
  • libwbclient
    Fixed in 4.15.5-5.el8
  • libwbclient-devel
    Fixed

    A version is affected if any line below covers it.

    • Affected before 4.15.5-5.el8
    • Affected before 4.15.5-8.el8_6
  • python3-samba
    Fixed in 4.15.5-5.el8
  • python3-samba-test
    Fixed in 4.15.5-5.el8
  • samba
    Fixed in 4.15.5-5.el8
  • samba-client
    Fixed in 4.15.5-5.el8
  • samba-client-libs
    Fixed in 4.15.5-5.el8
  • samba-common
    Fixed in 4.15.5-5.el8
  • samba-common-libs
    Fixed in 4.15.5-5.el8
  • samba-common-tools
    Fixed in 4.15.5-5.el8
  • samba-devel
    Fixed in 4.15.5-5.el8
  • samba-krb5-printing
    Fixed in 4.15.5-5.el8
  • samba-libs
    Fixed in 4.15.5-5.el8
  • samba-pidl
    Fixed in 4.15.5-5.el8
  • samba-test
    Fixed in 4.15.5-5.el8
  • samba-test-libs
    Fixed in 4.15.5-5.el8
  • samba-vfs-iouring
    Fixed in 4.15.5-5.el8
  • samba-winbind
    Fixed in 4.15.5-5.el8
  • samba-winbind-clients
    Fixed in 4.15.5-5.el8
  • samba-winbind-krb5-locator
    Fixed in 4.15.5-5.el8
  • samba-winbind-modules
    Fixed in 4.15.5-5.el8
  • samba-winexe
    Fixed in 4.15.5-5.el8

Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

Debian 12

  • samba
    Fixed in 2:4.16.0+dfsg-2

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

  • samba
    Fixed in 2:4.16.0+dfsg-2

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

  • samba
    Fixed in 2:4.16.0+dfsg-2

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 22.04 LTS

  • samba
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 14.04 LTS

  • samba
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 16.04 LTS

  • samba
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 18.04 LTS

  • samba
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 20.04 LTS

  • samba
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.