# RHSA-2021:3497: firefox security update

RHSA-2021:3497, released September 13, 2021, fixes 1 CVE in firefox (version 0:78.14.0-1.el8_4). None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2021-3497
- Platform: Linux
- Released: Sep 13, 2021
- Priority: High (Closes CVE-2021-38493, high severity)
- CVEs: 1, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://access.redhat.com/errata/RHSA-2021:3497

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [firefox](https://patchblox.com/security/data/product/linux/firefox.md) | RHEL 8 | 0:78.14.0-1.el8_4 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2021-38493](https://patchblox.com/security/data/cve/CVE-2021-38493.md) | High | Mozilla Firefox ESR and 3 others: Mozilla developers reported memory safety bugs present in Firefox 91 and Firefox ESR 78.13. | 8.8 | 0.0125 |  |

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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo