# OPENSUSE-SU-2026:21540-1: samba security update

OPENSUSE-SU-2026:21540-1, released August 6, 2026, fixes 13 CVEs in samba (version 4.22.11+git.552.66cfeb7de0a-160000.1.1). None of them is reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/fix/linux/opensuse-su-2026-21540-1
- Platform: Linux
- Released: Aug 6, 2026
- Priority: Urgent (Closes CVE-2026-2340, rated Critical)
- CVEs: 13, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://osv.dev/vulnerability/openSUSE-SU-2026:21540-1

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [samba](https://patchblox.com/security/data/product/linux/samba.md) | opensuse-leap 16.0 | 4.22.11+git.552.66cfeb7de0a-160000.1.1 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2026-2340](https://patchblox.com/security/data/cve/CVE-2026-2340.md) | Urgent | samba: WORM vfs module does not block directory modification and allows file changes by any user with | 9.0 | 0.0095 |  |
| [CVE-2026-1933](https://patchblox.com/security/data/cve/CVE-2026-1933.md) | Urgent | samba: missing access check on reparse point operations allows unauthorized users to modify the | 9.0 | 0.0086 |  |
| [CVE-2026-4408](https://patchblox.com/security/data/cve/CVE-2026-4408.md) | High | samba: improper escaping allows for remote command execution via the DCE/RPC SAMR server (bsc#1261163). | 9.8 | 0.4693 |  |
| [CVE-2026-4480](https://patchblox.com/security/data/cve/CVE-2026-4480.md) | High | samba: improper escaping allows for unauthenticated remote code execution via the printing subsystem | 9.0 | 0.2869 |  |
| [CVE-2026-3238](https://patchblox.com/security/data/cve/CVE-2026-3238.md) | High | samba: NULL pointer dereference in the WINS server compoenent of the AD domain controller code can lead | 7.5 | 0.0267 |  |
| [CVE-2026-58222](https://patchblox.com/security/data/cve/CVE-2026-58222.md) | High | samba: A security flaw combining LDAP filter injection and improper authorization checks was found in Samba Active Directory... | 8.8 | 0.0080 |  |
| [CVE-2026-3012](https://patchblox.com/security/data/cve/CVE-2026-3012.md) | High | samba: auto-enrolment GPO installing CA certificate over http without verification (bsc#1261159). | 9.0 | 0.0026 |  |
| [CVE-2026-58218](https://patchblox.com/security/data/cve/CVE-2026-58218.md) | Routine | samba: A flaw was found in Samba's internal DNS server where unauthenticated TKEY registration requests were added to the TK... | 5.3 | 0.0078 |  |
| [CVE-2026-58216](https://patchblox.com/security/data/cve/CVE-2026-58216.md) | Routine | samba: An out-of-bounds read flaw was found in Samba's Kerberos Key Distribution Center's (KDC) password change (kpasswd) se... | 5.3 | 0.0046 |  |
| [CVE-2026-58224](https://patchblox.com/security/data/cve/CVE-2026-58224.md) | Routine | ctdb: A flaw was found in Samba's CTDB, the clustered database service used by Samba | 6.5 | 0.0034 |  |
| [CVE-2026-15779](https://patchblox.com/security/data/cve/CVE-2026-15779.md) | Routine | ctdb: A flaw was found in samba's pam_winbind | n/a | 0.0011 |  |
| [CVE-2026-58221](https://patchblox.com/security/data/cve/CVE-2026-58221.md) | Routine | samba vulnerability | n/a | n/a |  |
| [CVE-2026-6949](https://patchblox.com/security/data/cve/CVE-2026-6949.md) | Routine | samba vulnerability | n/a | n/a |  |

---

Data as of 2026-11-11T13:47:35Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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