# CVEs published 2021-04-17

4 CVEs were published on April 17, 2021: 2 critical, 2 high. 2 are now in CISA KEV. Days are UTC.

- [CVE-2021-3493](https://cve.now/CVE-2021-3493.md): The overlayfs implementation in the linux kernel did not properly validate with respect to user namespaces the setting of file capabilities (CVSS 8.8, KEV, Ubuntu linux kernel)
- [CVE-2021-3492](https://cve.now/CVE-2021-3492.md): Ubuntu linux kernel shiftfs file system double free vulnerability (CVSS 8.8, Ubuntu Linux kernel)
- [CVE-2020-36195](https://cve.now/CVE-2020-36195.md): SQL Injection Vulnerability in Multimedia Console and the Media Streaming Add-On (CVSS 9.8, QNAP Systems QTS · QNAP Systems Media Streaming add-on +1)
- [CVE-2020-2509](https://cve.now/CVE-2020-2509.md): Command Injection Vulnerability in QTS and QuTS hero (CVSS 9.8, KEV, QNAP Systems QTS · QNAP Systems QuTS hero)

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