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CVE-2020-10766

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Date: September 15, 2020

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.

Language: C

Severity Score

Related Resources (7)

https://nvd.nist.gov/vuln/detail/CVE-2020-10766
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=dbbe2ad02e9df26e372f38cc3e70dab9222c832e
https://access.redhat.com/security/cve/CVE-2020-10766
https://security-tracker.debian.org/tracker/CVE-2020-10766
https://people.canonical.com/~ubuntu-security/cve/CVE-2020-10766
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10766
https://www.mend.io/vulnerability-database/CVE-2020-10766

Severity Score

Weakness Type (CWE)

Insufficient Information

NVD-CWE-noinfo

Expected Behavior Violation

CWE-440

Top Fix

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Upgrade Version

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CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): NONE
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): LOCAL
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): NONE
Availability (A): NONE
Additional information:

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