CVE-2020-10730

Name: CVE-2020-10730
Creator: NVD / NIST
Published: 2020-07-07T14:15:10.927+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 2.44%

Last modified Jun 17, 2026

CVE-2020-10730 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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. EPSS estimates a 2.44% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

2.44%

82.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Samba	Samba	>= 4.5.0, < 4.10.17
Samba	Samba	>= 4.11.0, < 4.11.11
Samba	Samba	>= 4.12.0, < 4.12.4
Redhat	Storage	3.0
Opensuse	Leap	15.1
Opensuse	Leap	15.2
Fedoraproject	Fedora	31
Debian	Debian Linux	9.0
Debian	Debian Linux	10.0

References

http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00030.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00054.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00000.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00002.htmlMailing List, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1849489%3B
https://lists.debian.org/debian-lts-announce/2020/11/msg00041.htmlIssue Tracking, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6YLNQ5GRXUKYRUAOFZ4DUBVN4SMTL6Q2/
https://security.gentoo.org/glsa/202007-15Third Party Advisory
https://www.debian.org/security/2021/dsa-4884Third Party Advisory
https://www.samba.org/samba/security/CVE-2020-10730.htmlVendor Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00030.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00054.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00000.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00002.htmlMailing List, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1849489%3B
https://lists.debian.org/debian-lts-announce/2020/11/msg00041.htmlIssue Tracking, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6YLNQ5GRXUKYRUAOFZ4DUBVN4SMTL6Q2/
https://security.gentoo.org/glsa/202007-15Third Party Advisory
https://www.debian.org/security/2021/dsa-4884Third Party Advisory
https://www.samba.org/samba/security/CVE-2020-10730.htmlVendor Advisory

Timeline

Published: Jul 7, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-10730?

How severe is CVE-2020-10730?

CVE-2020-10730 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 2.44% probability of exploitation in the next 30 days.

How do I fix CVE-2020-10730?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-10730?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST