What is CVE-2020-10766?

CVE-2020-10766 is a medium-severity vulnerability in Linux Kernel, classified under Expected Behavior Violation. CVSS score: 5.5/10. Published 2020-09-15.

How severe is CVE-2020-10766?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Is CVE-2020-10766 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Linux Kernel

CVE-2020-10766

A logic bug flaw was found in Linux kernel before 5.8-rc1 in the implementation of SSBD. A bug in the logic handling allows an attacker with a local account to disable SSBD protection during a context switch when additional speculative execution mitigations are in place. This issue was introduced when the per task/process conditional STIPB switching was added on top of the existing SSBD switching. The highest threat from this vulnerability is to confidentiality.

EPSS: 0.005 (38.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

Affected products

Linux Linux_kernel
Linux Kernel — versions before 5.8-rc1

Weakness classification (CWE)

CWE-440 — Expected Behavior Violation

Public proof-of-concept exploits

TinyNiko/android_

References

secalert@redhat.com (x_refsource_CONFIRM, Third Party Advisory, Issue Tracking)
secalert@redhat.com (Patch, x_refsource_MISC, Vendor Advisory)

Frequently asked questions

What is CVE-2020-10766?: CVE-2020-10766 is a medium-severity vulnerability in Linux Kernel, classified under Expected Behavior Violation. CVSS score: 5.5/10. Published 2020-09-15.
How severe is CVE-2020-10766?: Medium severity. CVSS v3 base score is 5.5 out of 10.
Is CVE-2020-10766 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.