Description
A use-after-free flaw was found in the way samba AD DC LDAP servers, handled 'Paged Results' control is combined with the 'ASQ' control. A malicious user in a samba AD could use this flaw to cause denial of service. This issue affects all samba versions before 4.10.15, before 4.11.8 and before 4.12.2.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Red Hat | samba | All versions before 4.10.15, All versions before 4.11.8, All versions before 4.12.2 | — |
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 | 2:4.12.3+dfsg-2 | — |
| Debian 13 | samba | 2:4.12.3+dfsg-2 | — |
| Debian 12 | samba | 2:4.12.3+dfsg-2 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | samba | 2:4.11.6+dfsg-0ubuntu1.1 | USN-4341-1 |
| Ubuntu 18.04 LTS | samba | 2:4.7.6+dfsg~ubuntu-0ubuntu2.16 | USN-4341-1 |
| Ubuntu 16.04 LTS | samba | 2:4.3.11+dfsg-0ubuntu0.16.04.26 | USN-4341-1 |
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 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 | samba | 4.11.11+git.180.2cf3b203f07-4.5.1 | SUSE-SU-2020:1948-1 |
Show 1 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 |
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 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | samba | 4.12.2-r0 | — |
| Alpine v3.23 | samba | 4.12.2-r0 | — |
| Alpine v3.22 | samba | 4.12.2-r0 | — |
| Alpine v3.21 | samba | 4.12.2-r0 | — |
| Alpine v3.20 | samba | 4.12.2-r0 | — |
Show 10 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | samba | 4.12.2-r0 | — |
| Alpine v3.18 | samba | 4.12.2-r0 | — |
| Alpine v3.17 | samba | 4.12.2-r0 | — |
| Alpine v3.16 | samba | 4.12.2-r0 | — |
| Alpine v3.15 | samba | 4.12.2-r0 | — |
| Alpine v3.14 | samba | 4.12.2-r0 | — |
| Alpine v3.13 | samba | 4.12.2-r0 | — |
| Alpine v3.12 | samba | 4.12.2-r0 | — |
| Alpine v3.11 | samba | 4.11.8-r0 | — |
| Alpine v3.10 | samba | 4.10.15-r0 | — |
Advisories 8
- WID-SEC-2026-3123 Samba: Mehrere Schwachstellen ermöglichen Denial of Service BSI CERT-Bund (WID) · Aug 31, 2026
- USN-4341-1 samba vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- SUSE-SU-2020:2673-1 Security update for samba 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-2024:10911-1 ldb-tools-2.3.0-1.3 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:1313-1 Security update for ldb, samba SUSE / openSUSE Security Updates · May 7, 2025
- SUSE-SU-2020:1948-1 Security update for ldb, samba SUSE / openSUSE Security Updates · May 2, 2025
References
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10700
- https://www.samba.org/samba/security/CVE-2020-10700.html
- FEDORA-2020-c931060ab7 vendor-advisory
- FEDORA-2020-e244c98af5 vendor-advisory
- FEDORA-2020-9cf0b1c8f1 vendor-advisory
- openSUSE-SU-2020:1023 vendor-advisory
- GLSA-202007-15 vendor-advisory
- openSUSE-SU-2020:1313 vendor-advisory