CVE-2020-15852

High

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.

Package Linux Kernel
Published 2020-07-20
Last modified 2024-11-21
CVSS version 3.1
Patch available
Awaiting data

CVSS 3.1 score

7.8

out of 10
High
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness type

CWE-276

CVE-2020-15852 is classified as CWE-276

See CWE-276 on MITRE CWE for full details on this weakness type.

References

5 total

Frequently asked questions

  • What is CVE-2020-15852?

    CVE-2020-15852 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 . CVE-2020-15852 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2020-15852?

    CVE-2020-15852 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H .

  • Is there a patch available for CVE-2020-15852?

    Monitor the NIST NVD and your Linux distribution's security advisories for CVE-2020-15852 patch availability.

  • Is CVE-2020-15852 actively exploited?

    No. CVE-2020-15852 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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