# RHSA-2021:3253: Security update for 2 packages

RHSA-2021:3253, released August 24, 2021, fixes 1 CVE across 2 products. None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2021-3253
- Platform: Linux
- Released: Aug 24, 2021
- Priority: High (Closes CVE-2021-3246, high severity)
- CVEs: 1, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://access.redhat.com/errata/RHSA-2021:3253

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [libsndfile](https://patchblox.com/security/data/product/linux/libsndfile.md) | RHEL 8 | 0:1.0.28-10.el8_4.1 |
| [libsndfile-devel](https://patchblox.com/security/data/product/linux/libsndfile-devel.md) | RHEL 8 | 0:1.0.28-10.el8_4.1 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2021-3246](https://patchblox.com/security/data/cve/CVE-2021-3246.md) | High | libsndfile: libsndfile is a C library for reading and writing files containing sampled sound, such as AIFF, AU, or WAV | 8.8 | 0.0312 |  |

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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo