CVE-2020-15852: An issue was discovered in the Linux kernel 5.5 through 5.7.9, as used in Xen through 4.13.x for x86 PV guests

Description

An issue was discovered in the Linux kernel 5.5 through 5.7.9, as used in Xen through 4.13.x for x86 PV guests. An attacker may be granted the I/O port permissions of an unrelated task. This occurs because tss_invalidate_io_bitmap mishandling causes a loss of synchronization between the I/O bitmaps of TSS and Xen, aka CID-cadfad870154.

CVSS vector

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

Attack vector

Local

Complexity

Low

Privileges

Low

User interaction

None

Confidentiality

High

Integrity

High

Availability

High

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)0.3% · higher than 27% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

KE

Kernel · Linux

5.5 through 5.7.9 · source: NVD

CB

Cloud Backup · Netapp

All versions, or not specified · source: NVD

SB

Solidfire Baseboard Management Controller · Netapp

All versions, or not specified · source: NVD

SC

Steelstore Cloud Integrated Storage · Netapp

All versions, or not specified · source: NVD

XE

Xen · Xen

through 4.13.1 · source: NVD