# RHSA-2021:1586: Security update for 11 packages

RHSA-2021:1586, released May 18, 2021, fixes 12 CVEs across 11 products. One of them is being exploited (CVE-2021-30661); 1 on CISA KEV. Patch Radar priority: Patch now.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2021-1586
- Platform: Linux
- Released: May 18, 2021
- Priority: Patch now (Closes CVE-2021-30661, exploited (CISA KEV))
- CVEs: 12, exploited: 1, on CISA KEV: 1
- Vendor advisory: https://access.redhat.com/errata/RHSA-2021:1586

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [gdm](https://patchblox.com/security/data/product/linux/gdm.md) | RHEL 8 | 1:3.28.3-39.el8 |
| [glib2](https://patchblox.com/security/data/product/linux/glib2.md) | RHEL 8 | 0:2.56.4-9.el8 |
| [glib2-devel](https://patchblox.com/security/data/product/linux/glib2-devel.md) | RHEL 8 | 0:2.56.4-9.el8 |
| [glib2-doc](https://patchblox.com/security/data/product/linux/glib2-doc.md) | RHEL 8 | 0:2.56.4-9.el8 |
| [glib2-fam](https://patchblox.com/security/data/product/linux/glib2-fam.md) | RHEL 8 | 0:2.56.4-9.el8 |
| [glib2-static](https://patchblox.com/security/data/product/linux/glib2-static.md) | RHEL 8 | 0:2.56.4-9.el8 |
| [glib2-tests](https://patchblox.com/security/data/product/linux/glib2-tests.md) | RHEL 8 | 0:2.56.4-9.el8 |
| [webkit2gtk3](https://patchblox.com/security/data/product/linux/webkit2gtk3.md) | RHEL 8 | 0:2.30.4-1.el8 |
| [webkit2gtk3-devel](https://patchblox.com/security/data/product/linux/webkit2gtk3-devel.md) | RHEL 8 | 0:2.30.4-1.el8 |
| [webkit2gtk3-jsc](https://patchblox.com/security/data/product/linux/webkit2gtk3-jsc.md) | RHEL 8 | 0:2.30.4-1.el8 |
| [webkit2gtk3-jsc-devel](https://patchblox.com/security/data/product/linux/webkit2gtk3-jsc-devel.md) | RHEL 8 | 0:2.30.4-1.el8 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2021-30661](https://patchblox.com/security/data/cve/CVE-2021-30661.md) | Patch now | gdm: GNOME is the default desktop environment of Red Hat Enterprise Linux.  The following packages have been upgraded to a... | 8.8 | 0.0449 | CISA KEV |
| [CVE-2020-13584](https://patchblox.com/security/data/cve/CVE-2020-13584.md) | High | gdm: GNOME is the default desktop environment of Red Hat Enterprise Linux.  The following packages have been upgraded to a... | 8.8 | 0.0494 |  |
| [CVE-2020-13543](https://patchblox.com/security/data/cve/CVE-2020-13543.md) | High | gdm: GNOME is the default desktop environment of Red Hat Enterprise Linux.  The following packages have been upgraded to a... | 8.8 | 0.0349 |  |
| [CVE-2019-13012](https://patchblox.com/security/data/cve/CVE-2019-13012.md) | High | gdm: GNOME is the default desktop environment of Red Hat Enterprise Linux.  The following packages have been upgraded to a... | 7.5 | 0.0321 |  |
| [CVE-2020-9951](https://patchblox.com/security/data/cve/CVE-2020-9951.md) | High | iTunes: A use after free issue was addressed with improved memory management. | 8.8 | 0.0233 |  |
| [CVE-2020-9983](https://patchblox.com/security/data/cve/CVE-2020-9983.md) | High | gdm: GNOME is the default desktop environment of Red Hat Enterprise Linux.  The following packages have been upgraded to a... | 8.8 | 0.0220 |  |
| [CVE-2021-1817](https://patchblox.com/security/data/cve/CVE-2021-1817.md) | High | gdm: GNOME is the default desktop environment of Red Hat Enterprise Linux.  The following packages have been upgraded to a... | 8.8 | 0.0194 |  |
| [CVE-2020-9948](https://patchblox.com/security/data/cve/CVE-2020-9948.md) | High | gdm: GNOME is the default desktop environment of Red Hat Enterprise Linux.  The following packages have been upgraded to a... | 8.8 | 0.0169 |  |
| [CVE-2021-1825](https://patchblox.com/security/data/cve/CVE-2021-1825.md) | High | iTunes: An input validation issue was addressed with improved input validation. | 8.1 | 0.0136 |  |
| [CVE-2021-1826](https://patchblox.com/security/data/cve/CVE-2021-1826.md) | High | gdm: GNOME is the default desktop environment of Red Hat Enterprise Linux.  The following packages have been upgraded to a... | 8.1 | 0.0114 |  |
| [CVE-2021-1820](https://patchblox.com/security/data/cve/CVE-2021-1820.md) | Routine | gdm: GNOME is the default desktop environment of Red Hat Enterprise Linux.  The following packages have been upgraded to a... | 6.5 | 0.0134 |  |
| [CVE-2020-16125](https://patchblox.com/security/data/cve/CVE-2020-16125.md) | Routine | gdm3: gdm3 versions before 3.36.2 or 3.38.2 would start gnome-initial-setup ifgdm3 can't contact the accountservice service... | 6.4 | 0.0111 |  |

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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

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