# ALSA-2021:4256: Security update for 5 packages

ALSA-2021:4256, released November 9, 2021, fixes 1 CVE across 5 products. None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/alsa-2021-4256
- Platform: Linux
- Released: Nov 9, 2021
- Priority: High (Closes CVE-2020-18032, high severity)
- CVEs: 1, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://osv.dev/vulnerability/ALSA-2021:4256

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [graphviz](https://patchblox.com/security/data/product/linux/graphviz.md) | almalinux 8 | 2.40.1-43.el8 |
| [graphviz-devel](https://patchblox.com/security/data/product/linux/graphviz-devel.md) | almalinux 8 | 2.40.1-43.el8 |
| [graphviz-doc](https://patchblox.com/security/data/product/linux/graphviz-doc.md) | almalinux 8 | 2.40.1-43.el8 |
| [graphviz-gd](https://patchblox.com/security/data/product/linux/graphviz-gd.md) | almalinux 8 | 2.40.1-43.el8 |
| [graphviz-python3](https://patchblox.com/security/data/product/linux/graphviz-python3.md) | almalinux 8 | 2.40.1-43.el8 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2020-18032](https://patchblox.com/security/data/cve/CVE-2020-18032.md) | High | graphviz: Graphviz is open-source graph-visualization software | 7.8 | 0.0261 |  |

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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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo