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Fencer Vulns
medium 4.3

CVE-2021-44141 json

All versions of Samba prior to 4.15.5 are vulnerable to a malicious client using a server symlink to determine if a file or directory exist…

published 2022-02-21 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-30994

cvss
4.3
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 65%
public exploits
0
none known

Summary

All versions of Samba prior to 4.15.5 are vulnerable to a malicious client using a server symlink to determine if a file or directory exists in an area of the server file system not exported under the share definition. SMB1 with unix extensions has to be enabled in order for this attack to succeed.

Patch / fix

  • samba samba 4.15.5
  • samba Debian 14, Debian 13, Debian 12 2:4.16.0+dfsg-2

debian advisories DEBIAN-CVE-2021-44141

  • samba RHEL 8 4.15.5-5.el8
  • ctdb RHEL 8 4.15.5-5.el8
  • samba-libs RHEL 8 4.15.5-5.el8
  • samba-pidl RHEL 8 4.15.5-5.el8
  • samba-test RHEL 8 4.15.5-5.el8
  • libwbclient RHEL 8 4.15.5-5.el8
  • libsmbclient RHEL 8 4.15.5-5.el8
  • samba-client RHEL 8 4.15.5-5.el8

red hat advisories RHSA-2022:2074RHSA-2022:1756

  • samba SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 +1 more 4.15.4+git.324.8332acf1a63-3.54.1
  • sssd SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 1.16.1-7.28.9
  • gnutls SLES for SAP 12 SP5, SLES 12 SP5 3.4.17-8.4.1
  • p11-kit SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 0.23.2-8.3.2
  • apparmor SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 2.8.2-56.6.3
  • libnettle SLES for SAP 12 SP5, SLES 12 SP5 3.1-21.3.2
  • ca-certificates SLES for SAP 12 SP5, SLES 12 SP5 1_201403302107-15.3.3
  • yast2-samba-client SLES for SAP 12 SP5, SLES 12 SP5 3.1.23-3.3.1

suse advisories SUSE-SU-2022:0323-1SUSE-SU-2022:0283-1

  • samba openSUSE Tumbleweed 4.15.5+git.328.f1f29505d84-1.1
  • samba openSUSE Leap 15.3 4.15.4+git.324.8332acf1a63-150300.3.25.3
  • ldb openSUSE Leap 15.3 2.4.1-150300.3.10.1
  • tdb openSUSE Leap 15.3 1.4.4-150300.3.3.2
  • krb5 openSUSE Leap 15.3 1.19.2-150300.8.3.2
  • sssd openSUSE Leap 15.3 1.16.1-150300.23.17.3
  • talloc openSUSE Leap 15.3 2.3.3-150300.3.3.2
  • tevent openSUSE Leap 15.3 0.11.0-150300.3.3.2

opensuse advisories openSUSE-SU-2024:11807-1openSUSE-SU-2022:0283-1

  • samba AlmaLinux 8 4.15.5-5.el8
  • ctdb AlmaLinux 8 4.15.5-5.el8
  • samba-libs AlmaLinux 8 4.15.5-5.el8
  • samba-pidl AlmaLinux 8 4.15.5-5.el8
  • samba-test AlmaLinux 8 4.15.5-5.el8
  • libwbclient AlmaLinux 8 4.15.5-5.el8
  • libsmbclient AlmaLinux 8 4.15.5-5.el8
  • samba-client AlmaLinux 8 4.15.5-5.el8

almalinux advisories ALSA-2022:2074

  • samba Rocky Linux 8 4.15.5-5.el8

rocky linux advisories RLSA-2022:2074

  • samba Alpine 3.16, Alpine 3.15 4.15.5-r0

alpine advisories ALPINE-CVE-2021-44141

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • samba Azure Linux 3.0 4.18.3-1

azure linux advisories AZL-37007

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

  • samba Arch Linux 4.15.5-1

arch linux advisories AVG-2648

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2021-44141 updated cvss 6.5

samba: Information leak via symlinks of existance of files or directories outside of the exported share

  • Red Hat Enterprise Linux AppStream (v. 8) samba-vfs-iouring 4.15.5-5.el8 Red Hat Enterprise Linux BaseOS (v. 8) ctdb 4.15.5-5.el8, samba 4.15.5-5.el8, samba-libs 4.15.5-5.el8, samba-pidl 4.15.5-5.el8, samba-test 4.15.5-5.el8, libwbclient 4.15.5-5.el8, +15 more Red Hat Enterprise Linux CRB (v. 8) samba-devel 4.15.5-5.el8, ctdb-debuginfo 4.15.5-5.el8, samba-debuginfo 4.15.5-5.el8, libwbclient-devel 4.15.5-5.el8, samba-debugsource 4.15.5-5.el8, libsmbclient-devel 4.15.5-5.el8, +17 more
    fixed: vendor fix RHSA-2022:2074
  • Red Hat Gluster 3.5 Samba on RHEL-8 ctdb 4.15.5-100.el8rhgs, samba 4.15.5-100.el8rhgs, samba-libs 4.15.5-100.el8rhgs, samba-pidl 4.15.5-100.el8rhgs, libwbclient 4.15.5-100.el8rhgs, libsmbclient 4.15.5-100.el8rhgs, +12 more
    fixed: vendor fix RHSA-2022:1756
  • Red Hat Enterprise Linux 6 samba, samba4, samba4-dc, samba-swat, samba4-libs, samba4-pidl, +17 more Red Hat Enterprise Linux 7 ctdb, samba, samba-dc, ctdb-tests, samba-libs, samba-pidl, +18 more Red Hat Enterprise Linux 9 ctdb, samba, libldb, ldb-tools, libnetapi, samba-libs, +27 more Red Hat Gluster 3.5 Samba on RHEL-8 libtdb 1.4.4-2.el8rhgs, libtalloc 2.3.3-2.el8rhgs, tdb-tools 1.4.4-2.el8rhgs, libtevent 0.11.0-1.el8rhgs, python3-tdb 1.4.4-2.el8rhgs, python3-talloc 2.3.3-2.el8rhgs, +1 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.09% chance of exploitation in the next 30 days, higher than 65% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
NVD 2.0 3.5 AV:N/AC:M/Au:S/C:P/I:N/A:N

Affected products

  • n/a Samba

Classification

Weakness
  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
  • CWE-59 Improper Link Resolution Before File Access

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.