# CVE-2021-20251: samba: A flaw was found in samba

CVE-2021-20251 is fixed in samba on 1 platform, first by DEBIAN-CVE-2021-20251, released March 6, 2023. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2021-20251
- Priority: Routine
- CVSS: 5.9 (medium)
- EPSS: 0.0076
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 6, 2023

## Description

A flaw was found in samba. A race condition in the password lockout code may lead to the risk of brute force attacks being successful if special conditions are met.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | samba Debian 12.15 (bookworm) | 2:4.17.2+dfsg-3 | [DEBIAN-CVE-2021-20251](https://patchblox.com/security/data/fix/linux/debian-cve-2021-20251.md) | Mar 6, 2023 |
| Linux | samba Debian 13.5 (trixie) | 2:4.17.2+dfsg-3 | [DEBIAN-CVE-2021-20251](https://patchblox.com/security/data/fix/linux/debian-cve-2021-20251.md) | Mar 6, 2023 |
| Linux | samba Debian 14 | 2:4.17.2+dfsg-3 | [DEBIAN-CVE-2021-20251](https://patchblox.com/security/data/fix/linux/debian-cve-2021-20251.md) | Mar 6, 2023 |

---

Data as of 2026-11-09T01:18:40Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.