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ubuntucveUbuntu.comUB:CVE-2020-27821
HistoryDec 08, 2020 - 12:00 a.m.

CVE-2020-27821

2020-12-0800:00:00
ubuntu.com
ubuntu.com
7

6 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

2.1 Low

CVSS2

Access Vector

LOCAL

Access 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

0.0004 Low

EPSS

Percentile

5.3%

A flaw was found in the memory management API of QEMU during the
initialization of a memory region cache. This issue could lead to an
out-of-bounds write access to the MSI-X table while performing MMIO
operations. A guest user may abuse this flaw to crash the QEMU process on
the host, resulting in a denial of service. This flaw affects QEMU versions
prior to 5.2.0.

Bugs

Notes

Author Note
mdeslaur exec.c in earlier releases
OSVersionArchitecturePackageVersionFilename
ubuntu20.04noarchqemu< 1:4.2-3ubuntu6.12UNKNOWN
ubuntu20.10noarchqemu< 1:5.0-5ubuntu9.4UNKNOWN

6 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

2.1 Low

CVSS2

Access Vector

LOCAL

Access 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

0.0004 Low

EPSS

Percentile

5.3%