# RHSA-2025:16109: firefox security update

RHSA-2025:16109, released September 16, 2025, fixes 8 CVEs in firefox (version 140.3.0-1.el10_0). None of them is reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/fix/linux/rhsa-2025-16109
- Platform: Linux
- Released: Sep 16, 2025
- Priority: High (Closes CVE-2025-10533, high severity)
- CVEs: 8, exploited: 0, on CISA KEV: 0
- Vendor advisory: https://access.redhat.com/errata/RHSA-2025:16109

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [firefox](https://patchblox.com/security/data/product/linux/firefox.md) | RHEL 10 | 140.3.0-1.el10_0 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2025-10533](https://patchblox.com/security/data/cve/CVE-2025-10533.md) | High | Integer overflow in the SVG component | 8.8 | 0.0078 |  |
| [CVE-2025-10528](https://patchblox.com/security/data/cve/CVE-2025-10528.md) | High | Sandbox escape due to undefined behavior, invalid pointer in the Graphics: Canvas2D component | 7.5 | 0.0037 |  |
| [CVE-2025-10537](https://patchblox.com/security/data/cve/CVE-2025-10537.md) | High | Memory safety bugs fixed in Firefox ESR 140.3, Thunderbird ESR 140.3, Firefox 143 and Thunderbird 143 | 8.8 | 0.0034 |  |
| [CVE-2025-10532](https://patchblox.com/security/data/cve/CVE-2025-10532.md) | High | Incorrect boundary conditions in the JavaScript: GC component | 7.5 | 0.0033 |  |
| [CVE-2025-10529](https://patchblox.com/security/data/cve/CVE-2025-10529.md) | High | Same-origin policy bypass in the Layout component | 7.5 | 0.0032 |  |
| [CVE-2025-10527](https://patchblox.com/security/data/cve/CVE-2025-10527.md) | High | Sandbox escape due to use-after-free in the Graphics: Canvas2D component | 7.5 | 0.0029 |  |
| [CVE-2024-12224](https://patchblox.com/security/data/cve/CVE-2024-12224.md) | High | aws-nitro-enclaves-cli: This update for aws-nitro-enclaves-cli fixes the following issues:  - Fix idna accepts Punycode labels that    do not... | 8.8 | 0.0023 |  |
| [CVE-2025-10536](https://patchblox.com/security/data/cve/CVE-2025-10536.md) | High | Information disclosure in the Networking: Cache component | 7.5 | 0.0018 |  |

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Data as of 2026-11-07T18:46:35Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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