Description
There is a use-after-free issue in all samba 4.9.x versions before 4.9.18, all samba 4.10.x versions before 4.10.12 and all samba 4.11.x versions before 4.11.5, essentially due to a call to realloc() while other local variables still point at the original buffer.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Red Hat | samba | all samba 4.11.x versions before 4.11.5, all samba 4.10.x versions before 4.10.12, all samba 4.9.x versions before 4.9.18 | — |
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 | 2:4.11.5+dfsg-1 | — |
| Debian 13 | samba | 2:4.11.5+dfsg-1 | — |
| Debian 12 | samba | 2:4.11.5+dfsg-1 | — |
| Debian 10 | samba | 2:4.9.5+dfsg-5+deb10u4 | DLA-3563-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | samba | 2:4.7.6+dfsg~ubuntu-0ubuntu2.15 | USN-4244-1 |
| Ubuntu 16.04 LTS | samba | 2:4.3.11+dfsg-0ubuntu0.16.04.25 | USN-4244-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP1 | samba | 4.9.5+git.243.e76c5cb3d97-3.21.1 | SUSE-SU-2020:0223-1 |
| 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 | 4.9.5+git.243.e76c5cb3d97-3.21.1 | SUSE-SU-2020:0223-1 |
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.243.e76c5cb3d97-3.21.1 | SUSE-SU-2020:0223-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | samba | 4.14.6+git.182.2205d5224e3-1.1 | openSUSE-SU-2024:11365-1 |
| openSUSE Leap 15.1 | samba | 4.9.5+git.243.e76c5cb3d97-lp151.2.15.1 | openSUSE-SU-2020:0122-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | samba | 4.11.5-r0 | — |
| Alpine v3.23 | samba | 4.11.5-r0 | — |
| Alpine v3.22 | samba | 4.11.5-r0 | — |
| Alpine v3.21 | samba | 4.11.5-r0 | — |
| Alpine v3.20 | samba | 4.11.5-r0 | — |
Show 10 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | samba | 4.11.5-r0 | — |
| Alpine v3.18 | samba | 4.11.5-r0 | — |
| Alpine v3.17 | samba | 4.11.5-r0 | — |
| Alpine v3.16 | samba | 4.11.5-r0 | — |
| Alpine v3.15 | samba | 4.11.5-r0 | — |
| Alpine v3.14 | samba | 4.11.5-r0 | — |
| Alpine v3.13 | samba | 4.11.5-r0 | — |
| Alpine v3.12 | samba | 4.11.5-r0 | — |
| Alpine v3.11 | samba | 4.11.5-r0 | — |
| Alpine v3.10 | samba | 4.10.12-r0 | — |
Advisories 7
- USN-4244-1 samba vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- DLA-3563-1 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-2024:11365-1 ctdb-4.14.6+git.182.2205d5224e3-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2020:0223-1 Security update for samba SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2020:0122-1 Security update for samba SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2023-2365 Samba: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 14, 2023
References
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-19344
- https://www.samba.org/samba/security/CVE-2019-19344.html
- https://security.netapp.com/advisory/ntap-20200122-0001/
- https://www.synology.com/security/advisory/Synology_SA_20_01
- USN-4244-1 vendor-advisory
- openSUSE-SU-2020:0122 vendor-advisory
- FEDORA-2020-6bd386c7eb vendor-advisory
- FEDORA-2020-f92cd0e72b vendor-advisory
- GLSA-202003-52 vendor-advisory
- [debian-lts-announce] 20230914 [SECURITY] [DLA 3563-1] samba security update mailing-list