CVE-2020-27675

2020-10-2200:00:00

ubuntu.com

CVSS2

4.7

Attack Vector

LOCAL

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

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

CVSS3

4.7

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

EPSS

Percentile

14.2%

JSON

An issue was discovered in the Linux kernel through 5.9.1, as used with Xen
through 4.14.x. drivers/xen/events/events_base.c allows event-channel
removal during the event-handling loop (a race condition). This can cause a
use-after-free or NULL pointer dereference, as demonstrated by a dom0 crash
via events for an in-reconfiguration paravirtualized device, aka
CID-073d0552ead5.

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchlinux< 4.15.0-129.132UNKNOWN
ubuntu20.04noarchlinux< 5.4.0-59.65UNKNOWN
ubuntu20.10noarchlinux< 5.8.0-44.50UNKNOWN
ubuntu16.04noarchlinux< 4.4.0-198.230UNKNOWN
ubuntu18.04noarchlinux-aws< 4.15.0-1091.96UNKNOWN
ubuntu20.04noarchlinux-aws< 5.4.0-1034.35UNKNOWN
ubuntu20.10noarchlinux-aws< 5.8.0-1024.26UNKNOWN
ubuntu14.04noarchlinux-aws< 4.4.0-1083.87UNKNOWN
ubuntu16.04noarchlinux-aws< 4.4.0-1119.133UNKNOWN
ubuntu18.04noarchlinux-aws-5.4< 5.4.0-1034.35~18.04.1UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	linux	< 4.15.0-129.132	UNKNOWN
ubuntu	20.04	noarch	linux	< 5.4.0-59.65	UNKNOWN
ubuntu	20.10	noarch	linux	< 5.8.0-44.50	UNKNOWN
ubuntu	16.04	noarch	linux	< 4.4.0-198.230	UNKNOWN
ubuntu	18.04	noarch	linux-aws	< 4.15.0-1091.96	UNKNOWN
ubuntu	20.04	noarch	linux-aws	< 5.4.0-1034.35	UNKNOWN
ubuntu	20.10	noarch	linux-aws	< 5.8.0-1024.26	UNKNOWN
ubuntu	14.04	noarch	linux-aws	< 4.4.0-1083.87	UNKNOWN
ubuntu	16.04	noarch	linux-aws	< 4.4.0-1119.133	UNKNOWN
ubuntu	18.04	noarch	linux-aws-5.4	< 5.4.0-1034.35~18.04.1	UNKNOWN