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TI-2020-11194 Aliases CVE-2020-14323GHSA-fhfw-5p8c-4cxr

NULL pointer dereference in Samba

Priority LOW 26CWE-170Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 13 fixed, 1 without a fix

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-476.

Summary

A null pointer dereference flaw was found in samba's Winbind service in versions before 4.11.15, before 4.12.9 and before 4.13.1. A local user could use this flaw to crash the winbind service causing denial of service.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00621 50th percentileScored 2026-11-07
Fix Partial Red Hat: 3 advisoriesRed Hat: 13 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
—SambaAll samba versions before 4.11.15, before 4.12.9 and before 4.13.1—No fix listedCNA
  • Samba Vendor— Affected All samba versions before 4.11.15, before 4.12.9 and before 4.13.1 Fixed in — No fix listed CNA

CPE configurations NVD · 6

CPEVersionsRoleVendor
cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*3.6.0 to before 4.11.15; 4.12.0 to before 4.12.9; 4.13.0 to before 4.13.1VulnerableSamba
cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*15.1VulnerableopenSUSE
cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:*15.2VulnerableopenSUSE
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*32VulnerableFedoraproject
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*33VulnerableFedoraproject
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*9.0VulnerableDebian
  • cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* Versions 3.6.0 to before 4.11.15; 4.12.0 to before 4.12.9; 4.13.0 to before 4.13.1 Vulnerable ·Samba
  • cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* Versions 15.1 Vulnerable ·openSUSE
  • cpe:2.3:o:opensuse:leap:15.2:*:*:*:*:*:*:* Versions 15.2 Vulnerable ·openSUSE
  • cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* Versions 32 Vulnerable ·Fedoraproject
  • cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* Versions 33 Vulnerable ·Fedoraproject
  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian

Remediation

Red Hat 3 advisories

  • RHSA-2021:3723 Released 2021-10-05 · Red Hat rating Moderate
    samba security, bug fix and enhancement update
    • Red Hat Gluster 3.5 Samba on RHEL-7 ctdb-4.11.6-112.el7rhgs, libsmbclient-4.11.6-112.el7rhgs, libsmbclient-devel-4.11.6-112.el7rhgs +18
  • RHSA-2021:1647 Released 2021-05-18 · Red Hat rating Moderate
    samba security, bug fix, and enhancement update
    • Red Hat CodeReady Linux Builder (v. 8) libsmbclient-devel-4.13.3-3.el8, libwbclient-devel-4.13.3-3.el8, samba-devel-4.13.3-3.el8
    • Red Hat Enterprise Linux AppStream (v. 8) openchange-2.3-27.el8
    • Red Hat Enterprise Linux BaseOS (v. 8) ctdb-4.13.3-3.el8, ctdb-tests-4.13.3-3.el8, libsmbclient-4.13.3-3.el8 +19
  • RHSA-2020:5439 Released 2020-12-15 · Red Hat rating Moderate
    samba security and bug fix update
    • Red Hat Enterprise Linux Client (v. 7) libsmbclient-4.10.16-9.el7_9, libwbclient-4.10.16-9.el7_9, samba-4.10.16-9.el7_9 +10
    • Red Hat Enterprise Linux Client Optional (v. 7) libsmbclient-devel-4.10.16-9.el7_9, libwbclient-devel-4.10.16-9.el7_9, samba-4.10.16-9.el7_9 +10
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) libsmbclient-devel-4.10.16-9.el7_9, libwbclient-devel-4.10.16-9.el7_9, samba-4.10.16-9.el7_9 +11
    • Red Hat Enterprise Linux Server (v. 7) libsmbclient-4.10.16-9.el7_9, libsmbclient-4.10.16-9.el7_9.ppc, libwbclient-4.10.16-9.el7_9 +17
    • Red Hat Enterprise Linux Server Optional (v. 7) libsmbclient-devel-4.10.16-9.el7_9, libsmbclient-devel-4.10.16-9.el7_9.ppc, libwbclient-devel-4.10.16-9.el7_9 +14
    • Red Hat Enterprise Linux Server Resilient Storage (v. 7) ctdb-4.10.16-9.el7_9, ctdb-tests-4.10.16-9.el7_9
    • Red Hat Enterprise Linux Workstation (v. 7) libsmbclient-4.10.16-9.el7_9, libwbclient-4.10.16-9.el7_9, samba-4.10.16-9.el7_9 +11
    • Red Hat Enterprise Linux Workstation Optional (v. 7) libsmbclient-devel-4.10.16-9.el7_9, libwbclient-devel-4.10.16-9.el7_9, samba-dc-4.10.16-9.el7_9 +8

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat CodeReady Linux Builder (v. 8)Fixed RHSA-2021:1647
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2021:1647
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2021:1647
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2020:5439
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2020:5439
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2020:5439
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2020:5439
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2020:5439
Red Hat Enterprise Linux Server Resilient Storage (v. 7)Fixed RHSA-2020:5439
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2020:5439
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2020:5439
Red Hat Gluster 3.5 Samba on RHEL-7Fixed RHSA-2021:3723
Red Hat Gluster 3.5 Samba on RHEL-8Fixed—

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-14323
  2. 2026-10-03 Alias added: GHSA-fhfw-5p8c-4cxr
  3. 2026-11-07 EPSS moved to the 50th–90th percentile

References

Advisory 9

Other 1

Sources

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