CVE-2020-10766 Security feature bypass in kernel

What is CVE-2020-10766?

CVE-2020-10766 is a medium-severity vulnerability in Linux kernel, published on 15 Sep 2020. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

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.

Weakness: CWE-440

Which versions are affected by CVE-2020-10766?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2020-10766?

Upgrade to a fixed version.

Is CVE-2020-10766 being exploited?

There is no known exploitation of CVE-2020-10766 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as A-169505740, ASB-A-169505740, DEBIAN-CVE-2020-10766, GHSA-c87p-h49c-qjmw, UBUNTU-CVE-2020-10766.