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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | Samba | All Samba versions before 4.10.17, before 4.11.11 and before 4.12.4 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | samba | 2:4.12.5+dfsg-1 | — |
| Debian 13 | samba | 2:4.12.5+dfsg-1 | — |
| Debian 12 | samba | 2:4.12.5+dfsg-1 | — |
| Debian 10 | ldb | 2:1.5.1+really1.4.6-3+deb10u1 | DSA-4884-1 |
| Debian 9 | samba | 2:4.5.16+dfsg-1+deb9u3 | DLA-2463-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | samba | 2:4.11.6+dfsg-0ubuntu1.3 | USN-4409-1 |
| Ubuntu 18.04 LTS | samba | 2:4.7.6+dfsg~ubuntu-0ubuntu2.17 | USN-4409-1 |
| Ubuntu 16.04 LTS | samba | 2:4.3.11+dfsg-0ubuntu0.16.04.28 | USN-4409-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 14.04 LTS | samba | 2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7 | USN-4409-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | libldb +3 | 2.1.3-2.el8 | RHSA-2020:4568 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Gluster Storage 3 | ctdb +20 | 4.11.6-107.el7rhgs | RHSA-2020:3119, RHSA-2020:3118 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP2 | ldb | 2.0.12-3.3.1 | SUSE-SU-2020:1948-1 |
| SLES 15 SP2 | samba | 4.11.11+git.180.2cf3b203f07-4.5.1 | SUSE-SU-2020:1948-1 |
| SLES 15 SP1 | ldb | 1.4.6-3.5.2 | SUSE-SU-2020:2067-1 |
| SLES 15 SP1 | samba | 4.9.5+git.343.4bc358522a9-3.38.1 | SUSE-SU-2020:1913-1 |
| SLES 12 SP5 | ldb | 1.5.8-3.5.1 | SUSE-SU-2020:2673-1 |
| SLES 12 SP5 | samba | 4.10.17+git.203.862547088ca-3.14.1 | SUSE-SU-2020:2673-1 |
| SLES 2 | ldb | 1.4.6-3.5.2 | SUSE-SU-2020:2067-1 |
| SLES 2 | samba | 4.9.5+git.343.4bc358522a9-3.38.1 | SUSE-SU-2020:1948-1, SUSE-SU-2020:1913-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP5 | ldb | 1.5.8-3.5.1 | SUSE-SU-2020:2673-1 |
| SLES for SAP 12 SP5 | samba | 4.10.17+git.203.862547088ca-3.14.1 | SUSE-SU-2020:2673-1 |
| SUSE Enterprise Storage 6 | samba | 4.9.5+git.343.4bc358522a9-3.38.1 | SUSE-SU-2020:1913-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | ldb | 2.3.0-1.3 | openSUSE-SU-2024:10911-1 |
| openSUSE Tumbleweed | samba | 4.14.6+git.182.2205d5224e3-1.1 | openSUSE-SU-2024:11365-1 |
| openSUSE Leap 15.2 | ldb | 2.0.12-lp152.2.3.1 | openSUSE-SU-2020:1313-1, openSUSE-SU-2020:1023-1 |
| openSUSE Leap 15.2 | samba | 4.11.11+git.180.2cf3b203f07-lp152.3.3.1 | openSUSE-SU-2020:1313-1, openSUSE-SU-2020:1023-1 |
| openSUSE Leap 15.1 | ldb | 1.4.6-lp151.2.3.1 | openSUSE-SU-2020:1121-1 |
| openSUSE Leap 15.1 | samba | 4.9.5+git.343.4bc358522a9-lp151.2.27.1 | openSUSE-SU-2020:0984-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | samba | 4.12.5-r0 | — |
| Alpine v3.23 | samba | 4.12.5-r0 | — |
| Alpine v3.22 | samba | 4.12.5-r0 | — |
| Alpine v3.21 | samba | 4.12.5-r0 | — |
| Alpine v3.20 | samba | 4.12.5-r0 | — |
Show 10 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | samba | 4.12.5-r0 | — |
| Alpine v3.18 | samba | 4.12.5-r0 | — |
| Alpine v3.17 | samba | 4.12.5-r0 | — |
| Alpine v3.16 | samba | 4.12.5-r0 | — |
| Alpine v3.15 | samba | 4.12.5-r0 | — |
| Alpine v3.14 | samba | 4.12.5-r0 | — |
| Alpine v3.13 | samba | 4.12.5-r0 | — |
| Alpine v3.12 | samba | 4.12.5-r0 | — |
| Alpine v3.11 | samba | 4.11.14-r0 | — |
| Alpine v3.10 | samba | 4.10.17-r0 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | libldb +3 | 2.1.3-2.el8 | ELSA-2020-4568 |
Advisories 18
- WID-SEC-2026-3125 Samba: Mehrere Schwachstellen BSI CERT-Bund (WID) · Aug 31, 2026
- USN-4409-1 samba vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-4884-1 ldb - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-2463-1 samba - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2020:2673-1 Security update for samba SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:1121-1 Security update for ldb SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:11365-1 ctdb-4.14.6+git.182.2205d5224e3-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:1023-1 Security update for ldb, samba SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:0984-1 Security update for samba SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:1913-1 Security update for samba SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10911-1 ldb-tools-2.3.0-1.3 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- RHSA-2020:4568 Red Hat Security Advisory: libldb security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2020:3119 Red Hat Security Advisory: samba security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2020:3118 Red Hat Security Advisory: samba security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- openSUSE-SU-2020:1313-1 Security update for ldb, samba SUSE / openSUSE Security Updates · May 7, 2025
- SUSE-SU-2020:2067-1 Security update for ldb SUSE / openSUSE Security Updates · May 2, 2025
- SUSE-SU-2020:1948-1 Security update for ldb, samba SUSE / openSUSE Security Updates · May 2, 2025
- ELSA-2020-4568 Moderate: libldb security, bug fix, and enhancement update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Nov 10, 2020
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1849489%3B
- https://www.samba.org/samba/security/CVE-2020-10730.html
- FEDORA-2020-5131d30947 vendor-advisory
- openSUSE-SU-2020:0984 vendor-advisory
- openSUSE-SU-2020:1023 vendor-advisory
- GLSA-202007-15 vendor-advisory
- openSUSE-SU-2020:1121 vendor-advisory
- openSUSE-SU-2020:1313 vendor-advisory
- [debian-lts-announce] 20201123 [SECURITY] [DLA 2463-1] samba security update mailing-list
- DSA-4884 vendor-advisory