CVE-2026-42915
MEDIUMCVSS 5.5/10EPSS 0.38%
Last modified
CVE-2026-42915 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. Incorrect calculation of buffer size in Windows VMSwitch allows an authorized attacker to deny service locally.. EPSS estimates a 0.38% chance of exploitation in the next 30 days.
Description
Incorrect calculation of buffer size in Windows VMSwitch allows an authorized attacker to deny service locally.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Windows 10 21h2 | < 10.0.19044.7417 |
| Microsoft | Windows 10 22h2 | < 10.0.19045.7417 |
| Microsoft | Windows 11 23h2 | < 10.0.22631.7219 |
| Microsoft | Windows 11 24h2 | < 10.0.26100.8655 |
| Microsoft | Windows 11 25h2 | < 10.0.26200.8655 |
| Microsoft | Windows 11 26h1 | < 10.0.28000.2269 |
| Microsoft | Windows Server 2022 | < 10.0.20348.5256 |
| Microsoft | Windows Server 2025 | < 10.0.26100.32995 |
References
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2026-42915?
Incorrect calculation of buffer size in Windows VMSwitch allows an authorized attacker to deny service locally.
How severe is CVE-2026-42915?
CVE-2026-42915 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.38% probability of exploitation in the next 30 days.
How do I fix CVE-2026-42915?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2026-42915?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST