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ubuntucveUbuntu.comUB:CVE-2020-36311
HistoryApr 07, 2021 - 12:00 a.m.

CVE-2020-36311

2021-04-0700:00:00
ubuntu.com
ubuntu.com
34
linux kernel
denial of service
sev vm
destruction
soft lockup
cve-2020-36311
architecture
kvm
svm

CVSS2

2.1

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:L/AC:L/Au:N/C:N/I:N/A:P

CVSS3

5.5

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS

0

Percentile

5.1%

JSON

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.

Notes

Author Note
sbeattie break commit 5dd0a57cf38ee is when SEV was introduced, actual break may be more recent.
OSVersionArchitecturePackageVersionFilename
ubuntu20.04noarchlinux-azure-5.8< 5.8.0-1043.46~20.04.1UNKNOWN
ubuntu20.04noarchlinux-aws< 5.4.0-1056.59UNKNOWN
ubuntu20.04noarchlinux-azure< 5.4.0-1058.60UNKNOWN
ubuntu20.04noarchlinux-gcp< 5.4.0-1052.56UNKNOWN
ubuntu20.04noarchlinux-bluefield< 5.4.0-1019.22UNKNOWN
ubuntu18.04noarchlinux-azure-5.4< 5.4.0-1058.60~18.04.1UNKNOWN
ubuntu18.04noarchlinux-gcp-5.4< 5.4.0-1052.56~18.04.1UNKNOWN
ubuntu18.04noarchlinux-gke-5.4< 5.4.0-1052.55~18.04.1UNKNOWN
ubuntu20.04noarchlinux-gkeop< 5.4.0-1023.24UNKNOWN
ubuntu18.04noarchlinux-gkeop-5.4< 5.4.0-1023.24~18.04.1UNKNOWN
Rows per page:
1-10 of 191

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CVSS2

2.1

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:L/AC:L/Au:N/C:N/I:N/A:P

CVSS3

5.5

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS

0

Percentile

5.1%

JSON
Related for UB:CVE-2020-36311
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