# ELSA-2021-2575: Security update for 3 packages

ELSA-2021-2575, released June 30, 2021, fixes 1 CVE across 3 products. None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/elsa-2021-2575
- Platform: Linux
- Released: Jun 30, 2021
- Priority: High (Closes CVE-2021-3520, high severity)
- CVEs: 1, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://linux.oracle.com/errata/ELSA-2021-2575.html

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [lz4](https://patchblox.com/security/data/product/linux/lz4.md) | ol 8 | 0:1.8.3-3.el8_4 |
| [lz4-devel](https://patchblox.com/security/data/product/linux/lz4-devel.md) | ol 8 | 0:1.8.3-3.el8_4 |
| [lz4-libs](https://patchblox.com/security/data/product/linux/lz4-libs.md) | ol 8 | 0:1.8.3-3.el8_4 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2021-3520](https://patchblox.com/security/data/cve/CVE-2021-3520.md) | High | lz4: The lz4 packages provide support for LZ4, a very fast, lossless compression algorithm that provides compression speed... | 9.8 | 0.0340 |  |

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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo