# RHSA-2023:4958: Security update for 2 packages

RHSA-2023:4958, released September 4, 2023, fixes 12 CVEs across 2 products. None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2023-4958
- Platform: Linux
- Released: Sep 4, 2023
- Priority: High (Closes CVE-2023-4584, high severity)
- CVEs: 12, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://access.redhat.com/errata/RHSA-2023:4958

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [firefox](https://patchblox.com/security/data/product/linux/firefox.md) | RHEL 9 | 0:102.15.0-1.el9_2 |
| [firefox-x11](https://patchblox.com/security/data/product/linux/firefox-x11.md) | RHEL 9 | 0:102.15.0-1.el9_2 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2023-4584](https://patchblox.com/security/data/cve/CVE-2023-4584.md) | High | Memory safety bugs fixed in Firefox 117, Firefox ESR 102.15, Firefox ESR 115.2, Thunderbird 102.15, and Thunderbird 115.2 | 8.8 | 0.0080 |  |
| [CVE-2023-4585](https://patchblox.com/security/data/cve/CVE-2023-4585.md) | High | Memory safety bugs fixed in Firefox 117, Firefox ESR 115.2, and Thunderbird 115.2 | 8.8 | 0.0077 |  |
| [CVE-2023-4053](https://patchblox.com/security/data/cve/CVE-2023-4053.md) | High | Full screen notification obscured by external program | 8.8 | 0.0077 |  |
| [CVE-2023-4583](https://patchblox.com/security/data/cve/CVE-2023-4583.md) | High | Browsing Context potentially not cleared when closing Private Window | 8.8 | 0.0069 |  |
| [CVE-2023-4574](https://patchblox.com/security/data/cve/CVE-2023-4574.md) | High | Memory corruption in IPC ColorPickerShownCallback | 8.8 | 0.0066 |  |
| [CVE-2023-4051](https://patchblox.com/security/data/cve/CVE-2023-4051.md) | High | Full screen notification obscured by file open dialog | 8.8 | 0.0066 |  |
| [CVE-2023-4575](https://patchblox.com/security/data/cve/CVE-2023-4575.md) | High | Memory corruption in IPC FilePickerShownCallback | 8.8 | 0.0066 |  |
| [CVE-2023-4577](https://patchblox.com/security/data/cve/CVE-2023-4577.md) | High | Memory corruption in JIT UpdateRegExpStatics | 8.8 | 0.0065 |  |
| [CVE-2023-4573](https://patchblox.com/security/data/cve/CVE-2023-4573.md) | High | Memory corruption in IPC CanvasTranslator | 8.8 | 0.0063 |  |
| [CVE-2023-4578](https://patchblox.com/security/data/cve/CVE-2023-4578.md) | High | Error reporting methods in SpiderMonkey could have triggered an Out of Memory Exception | 8.8 | 0.0062 |  |
| [CVE-2023-4581](https://patchblox.com/security/data/cve/CVE-2023-4581.md) | High | XLL file extensions were downloadable without warnings | 8.8 | 0.0057 |  |
| [CVE-2023-4580](https://patchblox.com/security/data/cve/CVE-2023-4580.md) | High | Push notifications saved to disk unencrypted | 8.8 | 0.0042 |  |

---

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