# ELSA-2021-2988: Security update for 4 packages

ELSA-2021-2988, released August 3, 2021, fixes 1 CVE across 4 products. None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/elsa-2021-2988
- Platform: Linux
- Released: Aug 3, 2021
- Priority: High (Closes CVE-2021-36740, high severity)
- CVEs: 1, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://linux.oracle.com/errata/ELSA-2021-2988.html

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [varnish](https://patchblox.com/security/data/product/linux/varnish.md) | ol 8 | 0:6.0.6-2.module+el8.4.0+20258+f99218b2.1 |
| [varnish-devel](https://patchblox.com/security/data/product/linux/varnish-devel.md) | ol 8 | 0:6.0.6-2.module+el8.4.0+20258+f99218b2.1 |
| [varnish-docs](https://patchblox.com/security/data/product/linux/varnish-docs.md) | ol 8 | 0:6.0.6-2.module+el8.4.0+20258+f99218b2.1 |
| [varnish-modules](https://patchblox.com/security/data/product/linux/varnish-modules.md) | ol 8 | 0:0.15.0-5.module+el8.3.0+7653+45014445 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2021-36740](https://patchblox.com/security/data/cve/CVE-2021-36740.md) | High | varnish: Varnish Cache is a high-performance HTTP accelerator | 8.1 | 0.0160 |  |

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Data as of 2026-11-07T12:40:37Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo