Patch tracker / KB5104034
KB5104034: .NET 10.0 installed on Linux Security Update (July 2026)
KB5104034 is a High security update for .NET 10.0 installed on Linux, released 2026-07-14. It closes 14 CVEs with a maximum CVSS of 8.8. The most likely of them to be attacked is CVE-2026-47302, which FIRST.org rates at 64% probability of exploitation in the next 30 days.
Update summary
Fixes 14 CVEs. Most severe CVSS 8.8 (High). EPSS exploit probability up to 1.1%. Among the lower half of tracked Microsoft updates by EPSS exploit probability.
A newer security update for .NET 10.0 installed on Linux has shipped since this one: KB5122104 (2026-08-11). For cumulative update families the newer package includes these fixes, so installing that one is usually the shorter path. Verify against your own update rings before you skip this package.
KB5104034 is a Security Update for .NET 10.0 across Linux, Mac OS, and Windows, so it reaches cross-platform runtime and application hosts rather than just Windows servers. The per-update CVE detail is still provisional because Microsoft has not published this cycle's breakdown, and the release document maps no named zero-days to this update. It matters now because .NET 10.0 often ships inside developer machines, build agents, and containerized services that are patched on a different schedule than the OS.
Do this: Inventory every host and container image running .NET 10.0 on Linux, Mac OS, and Windows, then schedule the KB5104034 runtime update and confirm dependent services restart cleanly.
AI-generated from public data, 2026-07-21. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for KB5104034
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for KB5104034
- Released
- 2026-07-14
- Last changed
- 2026-07-14
- Changes tracked
- 1
Senserva began recording day-to-day change history on 2026-07-07, and refreshes it several times a day. Release dates are historical where Microsoft publishes them; revision history is tracked from that date forward, so it does not include changes made before then.
Check if KB5104034 is installed
Elevated PowerShell. No output means it is not installed.
CVEs fixed by this update
Sorted exploited-first, then by CVSS. Every CVE links to its Senserva page with the full risk facts, references, and a ready-to-paste AI prompt.
| CVE | Severity | CVSS | EPSS | Exploited |
|---|---|---|---|---|
| CVE-2026-47300 | High | 8.8 | 1.1% | No |
| CVE-2026-47303 | High | 8.8 | 1.1% | No |
| CVE-2026-50528 | High | 8.2 | 1.1% | No |
| CVE-2026-47304 | High | 8.1 | 64% | No |
| CVE-2026-47302 | High | 7.5 | 64% | No |
| CVE-2026-50524 | High | 7.5 | 1.1% | No |
| CVE-2026-50525 | High | 7.5 | 64% | No |
| CVE-2026-50527 | High | 7.5 | 64% | No |
| CVE-2026-50648 | High | 7.5 | 64% | No |
| CVE-2026-50651 | High | 7.5 | 1.1% | No |
| CVE-2026-56170 | High | 7.5 | 1.1% | No |
| CVE-2026-57108 | High | 7.5 | 1.1% | No |
| CVE-2026-50526 | High | 7.0 | 1.1% | No |
| CVE-2026-50659 | Medium | 6.5 | 64% | No |
Scope and sources
- Affected products
- Also released in July 2026
KB5099444
185 CVEs · Critical · exploitedKB5099445
174 CVEs · Critical · exploitedKB5099535
261 CVEs · Critical · exploitedKB5099536
389 CVEs · Critical · exploitedKB5099538
312 CVEs · Critical · exploitedKB5099539
314 CVEs · Critical · exploitedKB5099540
326 CVEs · Critical · exploitedKB5101649
383 CVEs · Critical · exploitedThe full month, summarized: Microsoft Patch Tuesday.
- Authoritative references
See this and every Microsoft update ranked by real-world risk on the Microsoft Patch Tracker.