# DSA-5287-1: heimdal security update

DSA-5287-1, released November 22, 2022, fixes 1 CVE in heimdal (version 7.7.0+dfsg-2+deb11u2). None of them is reported as exploited. Patch Radar priority: Routine. The product is no longer supported.

- Web page: https://patchblox.com/security/fix/linux/dsa-5287-1
- Platform: Linux
- Released: Nov 22, 2022
- Priority: Routine (Closes CVE-2021-3671)
- CVEs: 1, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://security-tracker.debian.org/tracker/CVE-2021-3671

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [heimdal](https://patchblox.com/security/data/product/linux/heimdal.md) | Debian 11.6 (bullseye) | 7.7.0+dfsg-2+deb11u2 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2021-3671](https://patchblox.com/security/data/cve/CVE-2021-3671.md) | Routine | python3-samba: A null pointer de-reference was found in the way samba kerberos serverhandled missing sname in TGS-REQ (Ticket Granti... | n/a | 0.0212 |  |

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Data as of 2026-11-07T06:34:28Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo