Description
A flaw was found in Samba, in the vfs_streams_xattr module, where uninitialized heap memory could be written into alternate data streams. This allows an authenticated user to read residual memory content that may include sensitive data, resulting in an information disclosure vulnerability.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | samba | < 4.21.9, 4.22.0 – < 4.21.5, 4.23.0 – < 4.23.2 | 4.21.9 |
| Red Hat | Red Hat Enterprise Linux 10 | — | — |
| Red Hat | Red Hat Enterprise Linux 6 | — | — |
| Red Hat | Red Hat Enterprise Linux 7 | — | — |
| Red Hat | Red Hat Enterprise Linux 8 | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — |
| Red Hat | Red Hat OpenShift Container Platform 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 | 2:4.23.2+dfsg-1 | — |
| Debian 13 | samba | 2:4.22.6+dfsg-0+deb13u1 | — |
| Debian 12 | samba | 2:4.17.12+dfsg-0+deb12u3 | — |
| Debian 11 | samba | 2:4.13.13+dfsg-1~deb11u7 | DLA-4384-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 25.10 | samba | 2:4.22.3+dfsg-4ubuntu2.1 | USN-7826-1 |
| Ubuntu 24.04 LTS | samba | 2:4.19.5+dfsg-4ubuntu9.4 | USN-7826-1 |
| Ubuntu 22.04 LTS | samba | 2:4.15.13+dfsg-0ubuntu1.10 | USN-7826-1 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | samba | 2:4.15.13+dfsg-0ubuntu0.20.04.8+esm1 | USN-7826-2 |
| Ubuntu Pro 18.04 LTS | samba | 2:4.7.6+dfsg~ubuntu-0ubuntu2.29+esm3 | USN-7826-2 |
| Ubuntu Pro 16.04 LTS | samba | 2:4.3.11+dfsg-0ubuntu0.16.04.34+esm4 | USN-7826-2 |
| Ubuntu Pro 14.04 LTS | samba | 2:4.3.11+dfsg-0ubuntu0.14.04.20+esm15 | USN-7826-2 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | samba | 4.21.8+git.418.e80c9b2a88c-150700.3.11.2 | SUSE-SU-2025:3676-1 |
| SLES 15 SP6 | samba | 4.19.8+git.435.78ced6cf30d-150600.3.21.1 | SUSE-SU-2025:03612-1 |
| SLES 15 SP5 | samba | 4.17.12+git.510.0efaadf376b-150500.3.34.1 | SUSE-SU-2025:03603-1 |
| SLES 15 SP4 | samba | 4.15.13+git.736.b791be993ba-150400.3.40.1 | SUSE-SU-2025:03618-1 |
| SLES 15 SP3 | samba | 4.15.13+git.736.b791be993ba-150300.3.96.1 | SUSE-SU-2025:3677-1 |
Show 17 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | samba | 4.15.13+git.664.e8416d8d213-3.99.1 | SUSE-SU-2025:03604-1 |
| SLES for SAP 16.0 | samba | 4.22.5+git.431.dc5a539f124-160000.1.1 | SUSE-SU-2025:21005-1 |
| SLES for SAP 15 SP5 | samba | 4.17.12+git.510.0efaadf376b-150500.3.34.1 | SUSE-SU-2025:03603-1 |
| SLES for SAP 15 SP4 | samba | 4.15.13+git.736.b791be993ba-150400.3.40.1 | SUSE-SU-2025:03618-1 |
| SLES for SAP 15 SP3 | samba | 4.15.13+git.736.b791be993ba-150300.3.96.1 | SUSE-SU-2025:3677-1 |
| SLES 16.0 | samba | 4.22.5+git.431.dc5a539f124-160000.1.1 | SUSE-SU-2025:21005-1 |
| SLE Micro 6.2 | samba | 4.22.5+git.431.dc5a539f124-160000.1.1 | SUSE-SU-2025:21026-1 |
| SLE Micro 5.5 | samba | 4.17.12+git.510.0efaadf376b-150500.3.34.1 | SUSE-SU-2025:03603-1 |
| SLE Micro 5.4 | samba | 4.15.13+git.736.b791be993ba-150400.3.40.1 | SUSE-SU-2025:03618-1 |
| SLE Micro 5.3 | samba | 4.15.13+git.736.b791be993ba-150400.3.40.1 | SUSE-SU-2025:03618-1 |
| SLE Micro 5.2 | samba | 4.15.13+git.736.b791be993ba-150300.3.96.1 | SUSE-SU-2025:3677-1 |
| SLE HPC 15 SP5 | samba | 4.17.12+git.510.0efaadf376b-150500.3.34.1 | SUSE-SU-2025:03603-1 |
| SLE HPC 15 SP4 | samba | 4.15.13+git.736.b791be993ba-150400.3.40.1 | SUSE-SU-2025:03618-1 |
| SLE HPC 15 SP3 | samba | 4.15.13+git.736.b791be993ba-150300.3.96.1 | SUSE-SU-2025:3677-1 |
| SUSE Manager Server LTS 4.3 | samba | 4.15.13+git.736.b791be993ba-150400.3.40.1 | SUSE-SU-2025:03618-1 |
| SUSE Manager Proxy LTS 4.3 | samba | 4.15.13+git.736.b791be993ba-150400.3.40.1 | SUSE-SU-2025:03618-1 |
| SUSE Enterprise Storage 7.1 | samba | 4.15.13+git.736.b791be993ba-150300.3.96.1 | SUSE-SU-2025:3677-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | samba | 4.22.5+git.431.dc5a539f124-1.1 | openSUSE-SU-2025:15649-1 |
| openSUSE Leap 16.0 | samba | 4.22.5+git.431.dc5a539f124-160000.1.1 | openSUSE-SU-2025:20048-1 |
| openSUSE Leap 15.6 | samba | 4.19.8+git.435.78ced6cf30d-150600.3.21.1 | SUSE-SU-2025:03612-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | samba | 4.21.9-r0 | — |
| Alpine v3.23 | samba | 4.21.9-r0 | — |
| Alpine v3.22 | samba | 4.21.9-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | samba +31 | 2:4.17.12-1.amzn2023.0.3 | ALAS2023-2025-1234 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | samba | No fix yet | — |
| Azure Linux 2 (CBL-Mariner) | samba | No fix yet | — |
Advisories 17
- WID-SEC-2026-0489 Xerox FreeFlow Print Server: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff BSI CERT-Bund (WID) · Oct 21, 2026
- WID-SEC-2026-0349 Dell Avamar und NetWorker: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 17, 2026
- USN-7826-2 samba vulnerabilities Ubuntu Security Notices (USN) · Jun 25, 2026
- USN-7826-1 samba vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- openSUSE-SU-2025:20048-1 Security update for samba SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2025:15649-1 ctdb-4.22.5+git.431.dc5a539f124-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:3676-1 Security update for samba SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:3677-1 Security update for samba SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:21026-1 Security update for samba SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:03603-1 Security update for samba SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:21005-1 Security update for samba SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:03604-1 Security update for samba SUSE / openSUSE Security Updates · Mar 23, 2026
- WID-SEC-2025-2322 Samba: Mehrere Schwachstellen BSI CERT-Bund (WID) · Feb 11, 2026
- SUSE-SU-2025:03618-1 Security update for samba SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:03612-1 Security update for samba SUSE / openSUSE Security Updates · Feb 4, 2026
- DLA-4384-1 samba - security update Debian Security (DSA / DLA) · Nov 26, 2025
- ALAS2023-2025-1234 Moderate: samba security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Oct 27, 2025