HOMEVULNERABILITIESCVE-2020-15852
HIGH

CVE-2020-15852

CWE-276Published: July 20, 2020· Updated: Jun 17, 2026

7.8
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2020-15852 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 7.8.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

Linux1 product(s)
linux kernel
netapp3 product(s)
cloud backupsteelstore cloud integrated storagesolidfire baseboard management controller
xen1 product(s)
xen
Source: NVD CPE · 5 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttp://xenbits.xen.org/xsa/advisory-329.html
PATCHhttps://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cadfad870154e14f745ec845708bc17d166065f2
PATCHhttps://github.com/torvalds/linux/commit/cadfad870154e14f745ec845708bc17d166065f2
PATCHhttp://xenbits.xen.org/xsa/advisory-329.html
PATCHhttps://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cadfad870154e14f745ec845708bc17d166065f2
PATCHhttps://github.com/torvalds/linux/commit/cadfad870154e14f745ec845708bc17d166065f2
ADVISORYhttp://www.openwall.com/lists/oss-security/2020/07/21/2
ADVISORYhttps://security.netapp.com/advisory/ntap-20200810-0001/
ADVISORYhttp://www.openwall.com/lists/oss-security/2020/07/21/2
ADVISORYhttps://security.netapp.com/advisory/ntap-20200810-0001/

All References (10)

→
http://www.openwall.com/lists/oss-security/2020/07/21/2Mailing List · Third Party Advisory
→
http://xenbits.xen.org/xsa/advisory-329.htmlPatch · Third Party Advisory
→
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cadfad870154e14f745ec845708bc17d166065f2Mailing List · Patch · Vendor Advisory
→
https://github.com/torvalds/linux/commit/cadfad870154e14f745ec845708bc17d166065f2Patch · Third Party Advisory
→
https://security.netapp.com/advisory/ntap-20200810-0001/Third Party Advisory
→
http://www.openwall.com/lists/oss-security/2020/07/21/2Mailing List · Third Party Advisory
→
http://xenbits.xen.org/xsa/advisory-329.htmlPatch · Third Party Advisory
→
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cadfad870154e14f745ec845708bc17d166065f2Mailing List · Patch · Vendor Advisory
→
https://github.com/torvalds/linux/commit/cadfad870154e14f745ec845708bc17d166065f2Patch · Third Party Advisory
→
https://security.netapp.com/advisory/ntap-20200810-0001/Third Party Advisory

Quick Facts

CVE IDCVE-2020-15852
CVSS Score7.8 / 10
SeverityHIGH
WeaknessCWE-276
CISA KEVNo
Affected3 vendor(s)
PublishedJul 20, 2020

Related CVEs (CWE-276)

CVE-2020-29492
10.0
CVE-2022-42150
10.0
CVE-2023-29131
10.0
CVE-2019-19896
9.9
CVE-2025-40585
9.9
CVE-2024-57684
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-15852 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
← All Vulnerabilities·Search for CVE-2020-15852·NVD