# firefox 136.0+build3-0ubuntu0.20.04.1: firefox 136.0+build3-0ubuntu0.20.04.1 for Ubuntu 20.04.3 LTS (focal)

firefox 136.0+build3-0ubuntu0.20.04.1, released March 4, 2025, fixes 11 CVEs in firefox. None of them is reported as exploited. Patch Radar priority: High. The product is no longer supported.

- Web page: https://patchblox.com/security/fix/linux/ubuntu-focal-firefox-136.0-build3-0ubuntu0.20.04.1
- Platform: Linux
- Released: Mar 4, 2025
- Priority: High (Closes CVE-2025-1937, high severity)
- CVEs: 11, exploited: 0, on CISA KEV: 0

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [firefox](https://patchblox.com/security/data/product/linux/firefox.md) | Ubuntu 20.04.3 LTS (focal) | 136.0+build3-0ubuntu0.20.04.1 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2025-1937](https://patchblox.com/security/data/cve/CVE-2025-1937.md) | High | Memory safety bugs fixed in Firefox 136, Thunderbird 136, Firefox ESR 115.21, Firefox ESR 128.8, and Thunderbird 128.8 | 8.8 | 0.0056 |  |
| [CVE-2025-1931](https://patchblox.com/security/data/cve/CVE-2025-1931.md) | High | Use-after-free in WebTransportChild | 8.8 | 0.0054 |  |
| [CVE-2025-1942](https://patchblox.com/security/data/cve/CVE-2025-1942.md) | High | Disclosure of uninitialized memory when .toUpperCase() causes string to get longer | 9.8 | 0.0048 |  |
| [CVE-2025-1934](https://patchblox.com/security/data/cve/CVE-2025-1934.md) | High | Unexpected GC during RegExp bailout processing | 8.8 | 0.0045 |  |
| [CVE-2025-1936](https://patchblox.com/security/data/cve/CVE-2025-1936.md) | High | Adding %00 and a fake extension to a jar: URL changed the interpretation of the contents | 8.8 | 0.0045 |  |
| [CVE-2025-1943](https://patchblox.com/security/data/cve/CVE-2025-1943.md) | High | Memory safety bugs fixed in Firefox 136 and Thunderbird 136 | 8.2 | 0.0044 |  |
| [CVE-2025-1932](https://patchblox.com/security/data/cve/CVE-2025-1932.md) | High | Inconsistent comparator in XSLT sorting led to out-of-bounds access | 8.8 | 0.0042 |  |
| [CVE-2025-1935](https://patchblox.com/security/data/cve/CVE-2025-1935.md) | High | Clickjacking the registerProtocolHandler info-bar | 8.8 | 0.0034 |  |
| [CVE-2025-1938](https://patchblox.com/security/data/cve/CVE-2025-1938.md) | High | Memory safety bugs fixed in Firefox 136, Thunderbird 136, Firefox ESR 128.8, and Thunderbird 128.8 | 8.8 | 0.0034 |  |
| [CVE-2025-1933](https://patchblox.com/security/data/cve/CVE-2025-1933.md) | High | JIT corruption of WASM i32 return values on 64-bit CPUs | 8.8 | 0.0032 |  |
| [CVE-2025-1414](https://patchblox.com/security/data/cve/CVE-2025-1414.md) | Routine | Memory safety bugs fixed in Firefox 135.0.1 | 6.5 | 0.0045 |  |

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Data as of 2026-11-14T08:07:45Z 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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