Vulnerability Description
An issue was discovered in the Linux kernel before 5.9. arch/x86/kvm/svm/sev.c allows attackers to cause a denial of service (soft lockup) by triggering destruction of a large SEV VM (which requires unregistering many encrypted regions), aka CID-7be74942f184.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | < 5.9.0 |
| Debian | Debian Linux | 9.0 |
References
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.9Release NotesVendor Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7bPatchVendor Advisory
- https://lists.debian.org/debian-lts-announce/2021/07/msg00015.htmlMailing ListThird Party Advisory
- https://www.debian.org/security/2021/dsa-4941Third Party Advisory
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.9Release NotesVendor Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7bPatchVendor Advisory
- https://lists.debian.org/debian-lts-announce/2021/07/msg00015.htmlMailing ListThird Party Advisory
- https://www.debian.org/security/2021/dsa-4941Third Party Advisory
FAQ
What is CVE-2020-36311?
CVE-2020-36311 is a vulnerability with a CVSS score of 5.5 (MEDIUM). An issue was discovered in the Linux kernel before 5.9. arch/x86/kvm/svm/sev.c allows attackers to cause a denial of service (soft lockup) by triggering destruction of a large SEV VM (which requires u...
How severe is CVE-2020-36311?
CVE-2020-36311 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-36311?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Debian Debian Linux.