# CVE-2025-4609: Chromium: CVE-2025-4609 Incorrect handle provided in unspecified circumstances in Mojo

CVE-2025-4609 is fixed in 7 products on 2 platforms, first by Microsoft Edge Dev 137.0.3255.0, released April 11, 2025. It is not reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/cve/CVE-2025-4609
- Priority: Urgent
- CVSS: 9.6 (critical)
- EPSS: 0.0039
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 15, 2025
- Weakness: CWE-732: Incorrect Permission Assignment for Critical Resource
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-4609

## Description

<p>This CVE was assigned by Chrome.  Microsoft Edge (Chromium-based) ingests Chromium, which addresses this vulnerability. Please see <a href="https://chromereleases.googleblog.com/2025">Google Chrome Releases</a> for more information.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Windows apps | Google Chrome (EXE) | 144.0.7559.133 | [Google Chrome (EXE) 144.0.7559.133](https://patchblox.com/security/data/fix/windows-app/google.chrome.exe-144.0.7559.133.md) | Feb 3, 2026 |
| Windows apps | Google Chrome Dev (EXE) | 144.0.7534.3 | [Google Chrome Dev (EXE) 144.0.7534.3](https://patchblox.com/security/data/fix/windows-app/google.chrome.dev.exe-144.0.7534.3.md) | Nov 20, 2025 |
| Windows apps | Microsoft Edge | 136.0.3240.76 | [Microsoft Edge 136.0.3240.76](https://patchblox.com/security/data/fix/windows-app/microsoft.edge-136.0.3240.76.md) | May 15, 2025 |
| Windows apps | Microsoft Edge Beta | 137.0.3296.16 | [Microsoft Edge Beta 137.0.3296.16](https://patchblox.com/security/data/fix/windows-app/microsoft.edge.beta-137.0.3296.16.md) | May 12, 2025 |
| Windows apps | Microsoft Edge Dev | 137.0.3255.0 | [Microsoft Edge Dev 137.0.3255.0](https://patchblox.com/security/data/fix/windows-app/microsoft.edge.dev-137.0.3255.0.md) | Apr 11, 2025 |
| Windows apps | Microsoft Edge WebView2 Runtime | 136.0.3240.76 | [Microsoft Edge WebView2 Runtime 136.0.3240.76](https://patchblox.com/security/data/fix/windows-app/microsoft.edgewebview2runtime-136.0.3240.76.md) | May 15, 2025 |
| Linux | chromium Debian 12.15 (bookworm) | 136.0.7103.113-1~deb12u1 | [DSA-5920-1](https://patchblox.com/security/data/fix/linux/dsa-5920-1.md) | May 15, 2025 |
| Linux | chromium Debian 13.5 (trixie) | 136.0.7103.113-1 | [DEBIAN-CVE-2025-4609](https://patchblox.com/security/data/fix/linux/debian-cve-2025-4609.md) | Aug 22, 2025 |
| Linux | chromium Debian 14 | 136.0.7103.113-1 | [DEBIAN-CVE-2025-4609](https://patchblox.com/security/data/fix/linux/debian-cve-2025-4609.md) | Aug 22, 2025 |

---

Data as of 2026-11-08T00:53:09Z 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

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.