Vulnerabilities > CVE-2020-36311
Attack vector
LOCAL Attack complexity
LOW Privileges required
LOW Confidentiality impact
NONE Integrity impact
NONE Availability impact
HIGH Summary
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.
Vulnerable Configurations
References
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.9
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.9
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7be74942f184fdfba34ddd19a0d995deb34d4a03
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7be74942f184fdfba34ddd19a0d995deb34d4a03
- https://lists.debian.org/debian-lts-announce/2021/07/msg00015.html
- https://lists.debian.org/debian-lts-announce/2021/07/msg00015.html
- https://www.debian.org/security/2021/dsa-4941
- https://www.debian.org/security/2021/dsa-4941