# RHSA-2021:4526: Security update for 4 packages

RHSA-2021:4526, released November 9, 2021, fixes 2 CVEs across 4 products. None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2021-4526
- Platform: Linux
- Released: Nov 9, 2021
- Priority: High (Closes CVE-2021-27218, high severity)
- CVEs: 2, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://access.redhat.com/errata/RHSA-2021:4526

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [mingw32-glib2](https://patchblox.com/security/data/product/linux/mingw32-glib2.md) | RHEL 8 | 0:2.66.7-2.el8 |
| [mingw32-glib2-static](https://patchblox.com/security/data/product/linux/mingw32-glib2-static.md) | RHEL 8 | 0:2.66.7-2.el8 |
| [mingw64-glib2](https://patchblox.com/security/data/product/linux/mingw64-glib2.md) | RHEL 8 | 0:2.66.7-2.el8 |
| [mingw64-glib2-static](https://patchblox.com/security/data/product/linux/mingw64-glib2-static.md) | RHEL 8 | 0:2.66.7-2.el8 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2021-27218](https://patchblox.com/security/data/cve/CVE-2021-27218.md) | High | glib2: GLib provides the core application building blocks for libraries and applications written in C | 7.5 | 0.0408 |  |
| [CVE-2021-27219](https://patchblox.com/security/data/cve/CVE-2021-27219.md) | High | glib2: GLib provides the core application building blocks for libraries and applications written in C | 9.8 | 0.0306 |  |

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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo