CVE-2020-10768
Published: 10 June 2020
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.
From the Ubuntu Security Team
It was discovered that the Linux kernel could incorrectly enable Indirect Branch Speculation after it has been disabled for a process via a prctl() call. A local attacker could possibly use this to expose sensitive information.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
linux Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-115.116)
|
| eoan |
Ignored
(was pending \[5.3.0-63.57\] now end-of-life)
|
|
| focal |
Released
(5.4.0-45.49)
|
|
| precise |
Ignored
(was needs-triage ESM criteria)
|
|
| trusty |
Ignored
(was needs-triage ESM criteria)
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Released
(4.4.0-186.216)
|
|
|
Patches: Introduced by 9137bb27e60e554dab694eafa4cca241fa3a694f |
||
|
linux-aws Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1080.84)
|
| eoan |
Ignored
(was pending \[5.3.0-1031.33\] now end-of-life)
|
|
| focal |
Released
(5.4.0-1022.22)
|
|
| precise |
Does not exist
|
|
| trusty |
Released
(4.4.0-1075.79)
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Released
(4.4.0-1111.123)
|
|
|
linux-aws-5.0 Launchpad, Ubuntu, Debian |
bionic |
Ignored
(was needs-triage now end-of-life)
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
| precise |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-aws-5.3 Launchpad, Ubuntu, Debian |
bionic |
Released
(5.3.0-1032.34~18.04.2)
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
| precise |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-aws-5.4 Launchpad, Ubuntu, Debian |
bionic |
Released
(5.4.0-1022.22~18.04.1)
|
| focal |
Does not exist
|
|
| precise |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-aws-hwe Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
| precise |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Released
(4.15.0-1080.84~16.04.1)
|
|
|
linux-azure Launchpad, Ubuntu, Debian |
bionic |
Ignored
(was needs-triage now end-of-life)
|
| eoan |
Ignored
(was pending \[5.3.0-1033.34\] now end-of-life)
|
|
| focal |
Released
(5.4.0-1023.23)
|
|
| precise |
Does not exist
|
|
| trusty |
Released
(4.15.0-1093.103~14.04.1)
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Released
(4.15.0-1093.103~16.04.1)
|
|
|
linux-azure-4.15 Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1093.103)
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
| precise |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-azure-5.3 Launchpad, Ubuntu, Debian |
bionic |
Released
(5.3.0-1034.35~18.04.1)
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
| precise |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-azure-5.4 Launchpad, Ubuntu, Debian |
bionic |
Released
(5.4.0-1023.23~18.04.1)
|
| focal |
Does not exist
|
|
| precise |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-azure-edge Launchpad, Ubuntu, Debian |
bionic |
Ignored
(was needs-triage now end-of-life)
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
| precise |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-gcp Launchpad, Ubuntu, Debian |
bionic |
Ignored
(was needs-triage now end-of-life)
|
| eoan |
Ignored
(was pending \[5.3.0-1031.33\] now end-of-life)
|
|
| focal |
Released
(5.4.0-1022.22)
|
|
| precise |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Released
(4.15.0-1081.92~16.04.1)
|
|
|
linux-gcp-4.15 Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1081.92)
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
| precise |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-gcp-5.3 Launchpad, Ubuntu, Debian |
bionic |
Released
(5.3.0-1032.34~18.04.1)
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
| precise |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-gcp-5.4 Launchpad, Ubuntu, Debian |
bionic |
Released
(5.4.0-1022.22~18.04.1)
|
| focal |
Does not exist
|
|
| precise |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-gcp-edge Launchpad, Ubuntu, Debian |
bionic |
Ignored
(was needs-triage now end-of-life)
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
| precise |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-gke-4.15 Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1067.70)
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
| precise |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-gke-5.0 Launchpad, Ubuntu, Debian |
bionic |
Released
(5.0.0-1045.46)
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
| precise |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-gke-5.3 Launchpad, Ubuntu, Debian |
bionic |
Released
(5.3.0-1032.34~18.04.1)
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
| precise |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-hwe Launchpad, Ubuntu, Debian |
bionic |
Released
(5.3.0-64.58~18.04.1)
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
| precise |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Released
(4.15.0-115.116~16.04.1)
|
|
|
linux-hwe-5.4 Launchpad, Ubuntu, Debian |
bionic |
Released
(5.4.0-45.49~18.04.2)
|
| focal |
Does not exist
|
|
| precise |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-hwe-edge Launchpad, Ubuntu, Debian |
bionic |
Ignored
(was needs-triage now end-of-life)
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
| precise |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Ignored
(was needs-triage now end-of-life)
|
|
|
linux-kvm Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1072.73)
|
| eoan |
Ignored
(was pending \[5.3.0-1025.27\] now end-of-life)
|
|
| focal |
Released
(5.4.0-1021.21)
|
|
| precise |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Released
(4.4.0-1077.84)
|
|
|
linux-lts-trusty Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
| precise |
Ignored
(was needs-triage ESM criteria)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-lts-xenial Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
| precise |
Does not exist
|
|
| trusty |
Released
(4.4.0-186.216~14.04.1)
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-oem Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1094.104)
|
| eoan |
Ignored
(reached end-of-life)
|
|
| focal |
Does not exist
|
|
| precise |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Ignored
(was needs-triage now end-of-life)
|
|
|
linux-oem-5.6 Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| eoan |
Does not exist
|
|
| focal |
Released
(5.6.0-1020.20)
|
|
| precise |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-oem-osp1 Launchpad, Ubuntu, Debian |
bionic |
Released
(5.0.0-1065.70)
|
| eoan |
Ignored
(reached end-of-life)
|
|
| focal |
Does not exist
|
|
| precise |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-oracle Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1051.55)
|
| eoan |
Ignored
(was pending \[5.3.0-1029.31\] now end-of-life)
|
|
| focal |
Released
(5.4.0-1022.22)
|
|
| precise |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Released
(4.15.0-1051.55~16.04.1)
|
|
|
linux-oracle-5.0 Launchpad, Ubuntu, Debian |
bionic |
Ignored
(was needs-triage now end-of-life)
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
| precise |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-oracle-5.3 Launchpad, Ubuntu, Debian |
bionic |
Released
(5.3.0-1030.32~18.04.1)
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
| precise |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-oracle-5.4 Launchpad, Ubuntu, Debian |
bionic |
Released
(5.4.0-1022.22~18.04.1)
|
| focal |
Does not exist
|
|
| precise |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-raspi Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| eoan |
Does not exist
|
|
| focal |
Released
(5.4.0-1016.17)
|
|
| precise |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-raspi-5.4 Launchpad, Ubuntu, Debian |
bionic |
Released
(5.4.0-1016.17~18.04.1)
|
| focal |
Does not exist
|
|
| precise |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-raspi2 Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1068.72)
|
| eoan |
Ignored
(was pending \[5.3.0-1029.31\] now end-of-life)
|
|
| focal |
Ignored
(was needs-triage now end-of-life)
|
|
| precise |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Released
(4.4.0-1136.145)
|
|
|
linux-raspi2-5.3 Launchpad, Ubuntu, Debian |
bionic |
Released
(5.3.0-1030.32~18.04.2)
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
| precise |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-riscv Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| eoan |
Does not exist
|
|
| focal |
Released
(5.4.0-31.35)
|
|
| precise |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Does not exist
|
|
|
linux-snapdragon Launchpad, Ubuntu, Debian |
bionic |
Released
(4.15.0-1084.92)
|
| eoan |
Does not exist
|
|
| focal |
Does not exist
|
|
| precise |
Does not exist
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(5.8~rc1)
|
|
| xenial |
Released
(4.4.0-1140.148)
|
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.5 |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | None |
| Availability impact | None |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-10768
- https://www.openwall.com/lists/oss-security/2020/06/10/1
- https://ubuntu.com/security/notices/USN-4427-1
- https://ubuntu.com/security/notices/USN-4439-1
- https://ubuntu.com/security/notices/USN-4440-1
- https://ubuntu.com/security/notices/USN-4483-1
- https://ubuntu.com/security/notices/USN-4485-1
- NVD
- Launchpad
- Debian