Vulnerability · Published Sep 15, 2020 · Assigned by redhat
CVE-2020-10768
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 0.4% (higher than 34% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
A flaw was found in the Linux Kernel before 5.8-rc1 in the prctl() function, where it can be used to enable indirect branch speculation after it has been disabled. This call incorrectly reports it as being 'force disabled' when it is not and opens the system to Spectre v2 attacks. 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-2020-10768 |
| Debian:13 | linux | 5.7.6-1 | DEBIAN-CVE-2020-10768 |
| Debian:14 | linux | 5.7.6-1 | DEBIAN-CVE-2020-10768 |
| Ubuntu:22.04:LTS | linux-intel-iot-realtime | no fix listed | UBUNTU-CVE-2020-10768 |
| Ubuntu:24.04:LTS | linux-raspi-realtime | no fix listed | UBUNTU-CVE-2020-10768 |
| Ubuntu:22.04:LTS | linux-realtime | no fix listed | UBUNTU-CVE-2020-10768 |
| Ubuntu:22.04:LTS | linux-riscv | no fix listed | UBUNTU-CVE-2020-10768 |
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