# RHSA-2021:4097: Security update for 4 packages

RHSA-2021:4097, released November 2, 2021, fixes 1 CVE across 4 products. One of them is being exploited (CVE-2021-30858); 1 on CISA KEV. Patch Radar priority: Patch now.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2021-4097
- Platform: Linux
- Released: Nov 2, 2021
- Priority: Patch now (Closes CVE-2021-30858, exploited (CISA KEV))
- CVEs: 1, exploited: 1, on CISA KEV: 1
- Vendor advisory: https://access.redhat.com/errata/RHSA-2021:4097

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [webkit2gtk3](https://patchblox.com/security/data/product/linux/webkit2gtk3.md) | RHEL 8 | 0:2.30.4-3.el8_4 |
| [webkit2gtk3-devel](https://patchblox.com/security/data/product/linux/webkit2gtk3-devel.md) | RHEL 8 | 0:2.30.4-3.el8_4 |
| [webkit2gtk3-jsc](https://patchblox.com/security/data/product/linux/webkit2gtk3-jsc.md) | RHEL 8 | 0:2.30.4-3.el8_4 |
| [webkit2gtk3-jsc-devel](https://patchblox.com/security/data/product/linux/webkit2gtk3-jsc-devel.md) | RHEL 8 | 0:2.30.4-3.el8_4 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2021-30858](https://patchblox.com/security/data/cve/CVE-2021-30858.md) | Patch now | webkit2gtk3-jsc: WebKitGTK is the port of the portable web rendering engine WebKit to the GTK platform.  Security Fix(es):  * webkitgt... | 8.8 | 0.1338 | CISA KEV |

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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo