Release Planning for Samba 4.21

Samba 4.21 is in the Security Fixes Only Mode.

Release blocking bugs

• All 4.21 regression bugs
• Unresolved 4.21 regression bugs

Samba 4.21.10

(Updated 11-November-2025)

• Tuesday, November 11 2025 - Samba 4.21.10 has been released. There will be security releases only beyond this point.

 Release Notes Samba 4.21.10

Samba 4.21.9

(Updated 15-October-2025)

• Wednesday, October 15 2025 - Samba 4.21.9 has been released as a Security Release to address the following defect:
  • CVE-2025-10230 (Command injection via WINS server hook script.)
  • CVE-2025-9640 (Uninitialized memory disclosure via vfs_streams_xattr.)

 Release Notes Samba 4.21.9

Samba 4.21.8

(Updated 9-September-2025)

• Tuesday, September 9 2025 - Samba 4.21.8 has been released.

 Release Notes Samba 4.21.8

Samba 4.21.7

(Updated 7-July-2025)

• Monday, July 7 2025 - Samba 4.21.7 has been released.

 Release Notes Samba 4.21.7

Samba 4.21.6

(Updated 3-June-2025)

• Tuesday, June 3 2025 - Samba 4.21.6 has been released.

 Release Notes Samba 4.21.6

It contains the security-relevant bugfix CVE-2025-0620:

• CVE-2025-0620 (smbd doesn't pick up group membership changes when re-authenticating an expired SMB session.)

Samba 4.21.5

(Updated 17-February-2025)

• Monday, March 31 2025 - Samba 4.21.5 has been released.

 Release Notes Samba 4.21.5

Samba 4.21.4

(Updated 17-February-2025)

• Monday, February 17 2025 - Samba 4.21.4 has been released.

 Release Notes Samba 4.21.4

Samba 4.21.3

(Updated 06-January-2025)

• Monday, January 6 2025 - Samba 4.21.3 has been released.

 Release Notes Samba 4.21.3

Samba 4.21.2

(Updated 25-November-2024)

• Monday, November 25 2024 - Samba 4.21.2 has been released.

 Release Notes Samba 4.21.2

Samba 4.21.1

(Updated 14-October-2024)

• Monday, October 14 2024 - Samba 4.21.1 has been released.

 Release Notes Samba 4.21.1

Samba 4.21.0

(Updated 02-September-2024)

• Monday, September 2 2024 - Samba 4.21.0 has been released.

 Release Notes Samba 4.21.0

Samba 4.21.0rc4

(Updated 27-August-2024)

• Tuesday, August 27 2024 - Samba 4.21.0rc4 has been released.

 Release Notes Samba 4.21.0rc4

Samba 4.21.0rc3

(Updated 20-August-2024)

• Tuesday, August 20 2024 - Samba 4.21.0rc3 has been released.

 Release Notes Samba 4.21.0rc3

Samba 4.21.0rc2

(Updated 14-August-2024)

• Tuesday, August 13 2024 - Samba 4.21.0rc2 has been released.

 Release Notes Samba 4.21.0rc2

Samba 4.21.0rc1

(Updated 29-July-2024)

• Monday, July 29 2024 - Samba 4.21.0rc1 has been released.

 Release Notes Samba 4.21.0rc1