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TI-2020-08629 Aliases CVE-2020-10730GHSA-c9v6-jmq4-q762

Use after free in Samba

Priority LOW 34CWE-416Published · Updated

Key facts

Attack vector
Network
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: 3 fixed, 3 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-416 and the CVSS impact.

Summary

A NULL pointer dereference, or possible use-after-free flaw was found in Samba AD LDAP server in versions before 4.10.17, before 4.11.11 and before 4.12.4. Although some versions of Samba shipped with Red Hat Enterprise Linux do not support Samba in AD mode, the affected code is shipped with the libldb package. This flaw allows an authenticated user to possibly trigger a use-after-free or NULL pointer dereference. The highest threat from this vulnerability is to system availability.

Why it matters now

EPSS 0.0246 84th percentileScored 2026-11-07
Fix Partial Red Hat: 3 advisoriesRed Hat: 3 fixed, 3 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—SambaAll Samba versions before 4.10.17, before 4.11.11 and before 4.12.4—No fix listedCNA
  • Samba Vendor— Affected All Samba versions before 4.10.17, before 4.11.11 and before 4.12.4 Fixed in — No fix listed CNA

CPE configurations NVD · 7

CPEVersionsRoleVendor
cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:*4.5.0 to before 4.10.17; 4.11.0 to before 4.11.11; 4.12.0 to before 4.12.4VulnerableSamba
cpe:2.3:a:redhat:storage:3.0:*:*:*:*:*:*:*3.0VulnerableRed Hat
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:31:*:*:*:*:*:*:*31VulnerableFedoraproject
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*9.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*10.0VulnerableDebian
  • cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* Versions 4.5.0 to before 4.10.17; 4.11.0 to before 4.11.11; 4.12.0 to before 4.12.4 Vulnerable ·Samba
  • cpe:2.3:a:redhat:storage:3.0:*:*:*:*:*:*:* Versions 3.0 Vulnerable ·Red Hat
  • 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:31:*:*:*:*:*:*:* Versions 31 Vulnerable ·Fedoraproject
  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian

Remediation

Red Hat 3 advisories

  • RHSA-2020:4568 Released 2020-11-04 · Red Hat rating Moderate
    libldb security, bug fix, and enhancement update
    • Red Hat Enterprise Linux BaseOS (v. 8) ldb-tools-2.1.3-2.el8, libldb-2.1.3-2.el8, libldb-devel-2.1.3-2.el8 +1
  • RHSA-2020:3118 Released 2020-07-23 · Red Hat rating Moderate
    samba security update
    • Red Hat Gluster 3.5 Samba on RHEL-7 ctdb-4.11.6-107.el7rhgs, libsmbclient-4.11.6-107.el7rhgs, libsmbclient-devel-4.11.6-107.el7rhgs +18
  • RHSA-2020:3119 Released 2020-07-23 · Red Hat rating Moderate
    samba security update
    • Red Hat Gluster 3.5 Samba on RHEL-8 ctdb-4.11.6-107.el8rhgs, libsmbclient-4.11.6-107.el8rhgs, libsmbclient-devel-4.11.6-107.el8rhgs +18

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    Samba — openSUSE-SU-2020:0984

    4 records Highest priority Priority LOW 4 LOW

    Other records, highest priority first

    • TI-2020-11174 A flaw was found in the AD DC NBT server in all Samba versions before 4.10.17, before…Priority LOW 39
    • TI-2020-08643 Uncontrolled resource consumption in SambaPriority LOW 39
    • TI-2020-08657 Use after free in SambaPriority LOW 34
    Show all 4 records → Advisory →
  • Advisory ·

    Samba — FEDORA-2020-5131d30947

    4 records Highest priority Priority LOW 4 LOW

    Other records, highest priority first

    • TI-2020-11174 A flaw was found in the AD DC NBT server in all Samba versions before 4.10.17, before…Priority LOW 39
    • TI-2020-08643 Uncontrolled resource consumption in SambaPriority LOW 39
    • TI-2020-08657 Use after free in SambaPriority LOW 34
    Show all 4 records → Advisory →

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 5AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 7AffectedNo fix planned: Will not fix
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2020:4568
Red Hat Gluster 3.5 Samba on RHEL-7Fixed RHSA-2020:3118
Red Hat Gluster 3.5 Samba on RHEL-8Fixed RHSA-2020:3119

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-10730
  2. 2026-10-03 Alias added: GHSA-c9v6-jmq4-q762

References

Advisory 9

Other 1

Sources

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