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CVE-2020-15852

HIGH
7.8
CVSS Score
Published: July 20, 2020 at 06:54 PM UTC
Updated: June 17, 2026 at 02:57 AM UTC
5 products affected across 3 vendorsLinux KernelXenCloud Backup

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Severity
HIGH7.8
Exploit prediction
EPSS 0.3%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
95%
5.5 ≤ v ≤ 5.7.9
Cloud Backup· NetAppdrupal
95%
All versions
Solidfire Baseboard Management Controller· NetApp
95%
All versions
Steelstore Cloud Integrated Storage· NetApp
95%
All versions
Xen· Xenwordpress-plugin
95%
v ≤ 4.13.1

References (5)

Mailing Listx_refsource_MLISTThird Party Advisory
Source: [email protected]
http://www.openwall.com/lists/oss-security/2020/07/21/2
x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
http://xenbits.xen.org/xsa/advisory-329.html
x_refsource_MISCMailing ListPatchVendor Advisory
Source: [email protected]
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cadfad870154e14f745ec845708bc17d166065f2
x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/torvalds/linux/commit/cadfad870154e14f745ec845708bc17d166065f2
x_refsource_CONFIRMThird Party Advisory
Source: [email protected]
https://security.netapp.com/advisory/ntap-20200810-0001/

CVSS

7.8HIGH[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-276

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