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cve[email protected]CVE-2020-27675
HistoryOct 22, 2020 - 9:15 p.m.

CVE-2020-27675

2020-10-2221:15:14
CWE-416
CWE-476
CWE-362
[email protected]
web.nvd.nist.gov
123
cve-2020-27675
linux kernel
xen
event channel
race condition
use-after-free
null pointer dereference
security vulnerability
nvd

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

AI Score

5.5

Confidence

High

EPSS

0

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.

Affected configurations

NVD
Node
linuxlinux_kernelRange≤5.9.1
Node
fedoraprojectfedoraMatch31
OR
fedoraprojectfedoraMatch32
OR
fedoraprojectfedoraMatch33
Node
debiandebian_linuxMatch9.0
VendorProductVersionCPE
linuxlinux_kernelcpe:/o:linux:linux_kernel::::

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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

AI Score

5.5

Confidence

High

EPSS

0

Percentile

14.2%

JSON
Related for CVE-2020-27675
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