# RHSA-2025:18285: firefox security update

RHSA-2025:18285, released October 20, 2025, fixes 7 CVEs in firefox (version 0:140.4.0-3.el8_10). None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2025-18285
- Platform: Linux
- Released: Oct 20, 2025
- Priority: High (Closes CVE-2025-11708, high severity)
- CVEs: 7, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://access.redhat.com/errata/RHSA-2025:18285

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [firefox](https://patchblox.com/security/data/product/linux/firefox.md) | RHEL 8 | 0:140.4.0-3.el8_10 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2025-11708](https://patchblox.com/security/data/cve/CVE-2025-11708.md) | High | Use-after-free in MediaTrackGraphImpl::GetInstance() | 9.8 | 0.0051 |  |
| [CVE-2025-11709](https://patchblox.com/security/data/cve/CVE-2025-11709.md) | High | Out of bounds read/write in a privileged process triggered by WebGL textures | 9.8 | 0.0042 |  |
| [CVE-2025-11710](https://patchblox.com/security/data/cve/CVE-2025-11710.md) | High | Cross-process information leaked due to malicious IPC messages | 9.8 | 0.0042 |  |
| [CVE-2025-11714](https://patchblox.com/security/data/cve/CVE-2025-11714.md) | High | Memory safety bugs fixed in Firefox ESR 115.29, Firefox ESR 140.4, Thunderbird ESR 140.4, Firefox 144 and Thunderbird 144 | 8.8 | 0.0034 |  |
| [CVE-2025-11715](https://patchblox.com/security/data/cve/CVE-2025-11715.md) | High | Memory safety bugs fixed in Firefox ESR 140.4, Thunderbird ESR 140.4, Firefox 144 and Thunderbird 144 | 8.8 | 0.0033 |  |
| [CVE-2025-11711](https://patchblox.com/security/data/cve/CVE-2025-11711.md) | High | Some non-writable Object properties could be modified | 7.5 | 0.0023 |  |
| [CVE-2025-11712](https://patchblox.com/security/data/cve/CVE-2025-11712.md) | High | An OBJECT tag type attribute overrode browser behavior on web resources without a content-type | 7.5 | 0.0022 |  |

---

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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo