Vulnerability · Published Sep 15, 2020 · Assigned by redhat
CVE-2020-10766
Medium 5.5
In plain English
A medium-severity security flaw in kernel from Linux Kernel. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | linux | 5.7.6-1 | DEBIAN-CVE-2020-10766 |
| Debian:13 | linux | 5.7.6-1 | DEBIAN-CVE-2020-10766 |
| Debian:14 | linux | 5.7.6-1 | DEBIAN-CVE-2020-10766 |
| Ubuntu:22.04:LTS | linux-intel-iot-realtime | no fix listed | UBUNTU-CVE-2020-10766 |
| Ubuntu:24.04:LTS | linux-raspi-realtime | no fix listed | UBUNTU-CVE-2020-10766 |
| Ubuntu:22.04:LTS | linux-realtime | no fix listed | UBUNTU-CVE-2020-10766 |
| Ubuntu:22.04:LTS | linux-riscv | no fix listed | UBUNTU-CVE-2020-10766 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Linux Kernel | kernel | before 5.8-rc1 |
Weakness: CWE-440 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N