CVE-2020-4788
Publication date 19 November 2020
Last updated 24 July 2024
Ubuntu priority
Cvss 3 Severity Score
IBM Power9 (AIX 7.1, 7.2, and VIOS 3.1) processors could allow a local user to obtain sensitive information from the data in the L1 cache under extenuating circumstances. IBM X-Force ID: 189296.
From the Ubuntu Security Team
It was discovered that Power 9 processors could be coerced to expose information from the L1 cache in certain situations. A local attacker could use this to expose sensitive information.
Status
Package | Ubuntu Release | Status |
---|---|---|
linux | ||
20.04 LTS focal |
Fixed 5.4.0-56.62
|
|
18.04 LTS bionic |
Fixed 4.15.0-126.129
|
|
16.04 LTS xenial |
Fixed 4.4.0-197.229
|
|
14.04 LTS trusty | Ignored | |
linux-aws | ||
20.04 LTS focal |
Fixed 5.4.0-1032.33
|
|
18.04 LTS bionic |
Not affected
|
|
16.04 LTS xenial |
Fixed 4.4.0-1119.133
|
|
14.04 LTS trusty |
Fixed 4.4.0-1082.86
|
|
linux-aws-5.0 | ||
20.04 LTS focal | Not in release | |
18.04 LTS bionic | Ignored | |
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-aws-5.3 | ||
20.04 LTS focal | Not in release | |
18.04 LTS bionic | Ignored | |
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-aws-5.4 | ||
20.04 LTS focal | Not in release | |
18.04 LTS bionic |
Fixed 5.4.0-1032.33~18.04.1
|
|
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-aws-hwe | ||
20.04 LTS focal | Not in release | |
18.04 LTS bionic | Not in release | |
16.04 LTS xenial |
Not affected
|
|
14.04 LTS trusty | Not in release | |
linux-azure | ||
20.04 LTS focal |
Fixed 5.4.0-1034.35
|
|
18.04 LTS bionic | Ignored | |
16.04 LTS xenial |
Not affected
|
|
14.04 LTS trusty |
Fixed 4.15.0-1100.111~14.04.1
|
|
linux-azure-4.15 | ||
20.04 LTS focal | Not in release | |
18.04 LTS bionic |
Not affected
|
|
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-azure-5.3 | ||
20.04 LTS focal | Not in release | |
18.04 LTS bionic | Ignored | |
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-azure-5.4 | ||
20.04 LTS focal | Not in release | |
18.04 LTS bionic |
Fixed 5.4.0-1034.35~18.04.1
|
|
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-azure-edge | ||
20.04 LTS focal | Not in release | |
18.04 LTS bionic | Ignored | |
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-dell300x | ||
20.04 LTS focal | Not in release | |
18.04 LTS bionic |
Fixed 4.15.0-1009.13
|
|
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-gcp | ||
20.04 LTS focal |
Fixed 5.4.0-1032.34
|
|
18.04 LTS bionic | Ignored | |
16.04 LTS xenial |
Not affected
|
|
14.04 LTS trusty | Not in release | |
linux-gcp-4.15 | ||
20.04 LTS focal | Not in release | |
18.04 LTS bionic |
Not affected
|
|
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-gcp-5.3 | ||
20.04 LTS focal | Not in release | |
18.04 LTS bionic | Ignored | |
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-gcp-5.4 | ||
20.04 LTS focal | Not in release | |
18.04 LTS bionic |
Fixed 5.4.0-1032.34~18.04.1
|
|
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-gcp-edge | ||
20.04 LTS focal | Not in release | |
18.04 LTS bionic | Ignored | |
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-gke-4.15 | ||
20.04 LTS focal | Not in release | |
18.04 LTS bionic |
Not affected
|
|
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-gke-5.0 | ||
20.04 LTS focal | Not in release | |
18.04 LTS bionic |
Not affected
|
|
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-gke-5.3 | ||
20.04 LTS focal | Not in release | |
18.04 LTS bionic |
Not affected
|
|
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-gke-5.4 | ||
20.04 LTS focal | Not in release | |
18.04 LTS bionic |
Fixed 5.4.0-1032.34~18.04.1
|
|
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-gkeop | ||
20.04 LTS focal |
Not affected
|
|
18.04 LTS bionic | Not in release | |
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-gkeop-5.4 | ||
20.04 LTS focal | Not in release | |
18.04 LTS bionic |
Fixed 5.4.0-1007.8~18.04.1
|
|
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-hwe | ||
20.04 LTS focal | Not in release | |
18.04 LTS bionic |
Not affected
|
|
16.04 LTS xenial |
Fixed 4.15.0-126.129~16.04.1
|
|
14.04 LTS trusty | Not in release | |
linux-hwe-5.4 | ||
20.04 LTS focal | Not in release | |
18.04 LTS bionic |
Fixed 5.4.0-56.62~18.04.1
|
|
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-hwe-5.8 | ||
20.04 LTS focal |
Fixed 5.8.0-31.33~20.04.1
|
|
18.04 LTS bionic | Not in release | |
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-hwe-edge | ||
20.04 LTS focal | Not in release | |
18.04 LTS bionic | Ignored | |
16.04 LTS xenial | Ignored | |
14.04 LTS trusty | Not in release | |
linux-kvm | ||
20.04 LTS focal |
Fixed 5.4.0-1028.29
|
|
18.04 LTS bionic |
Not affected
|
|
16.04 LTS xenial |
Fixed 4.4.0-1085.94
|
|
14.04 LTS trusty | Not in release | |
linux-lts-trusty | ||
20.04 LTS focal | Not in release | |
18.04 LTS bionic | Not in release | |
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-lts-xenial | ||
20.04 LTS focal | Not in release | |
18.04 LTS bionic | Not in release | |
16.04 LTS xenial | Not in release | |
14.04 LTS trusty |
Fixed 4.4.0-197.229~14.04.1
|
|
linux-oem | ||
20.04 LTS focal | Not in release | |
18.04 LTS bionic |
Not affected
|
|
16.04 LTS xenial | Ignored | |
14.04 LTS trusty | Not in release | |
linux-oem-5.10 | ||
20.04 LTS focal |
Not affected
|
|
18.04 LTS bionic | Not in release | |
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-oem-5.6 | ||
20.04 LTS focal |
Not affected
|
|
18.04 LTS bionic | Not in release | |
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-oem-osp1 | ||
20.04 LTS focal | Not in release | |
18.04 LTS bionic | Ignored | |
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-oracle | ||
20.04 LTS focal |
Fixed 5.4.0-1032.34
|
|
18.04 LTS bionic |
Not affected
|
|
16.04 LTS xenial |
Not affected
|
|
14.04 LTS trusty | Not in release | |
linux-oracle-5.0 | ||
20.04 LTS focal | Not in release | |
18.04 LTS bionic | Ignored | |
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-oracle-5.3 | ||
20.04 LTS focal | Not in release | |
18.04 LTS bionic | Ignored | |
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-oracle-5.4 | ||
20.04 LTS focal | Not in release | |
18.04 LTS bionic |
Fixed 5.4.0-1033.35
|
|
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-raspi | ||
20.04 LTS focal |
Not affected
|
|
18.04 LTS bionic | Not in release | |
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-raspi-5.4 | ||
20.04 LTS focal | Not in release | |
18.04 LTS bionic |
Not affected
|
|
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-raspi2 | ||
20.04 LTS focal | Ignored | |
18.04 LTS bionic |
Not affected
|
|
16.04 LTS xenial |
Fixed 4.4.0-1143.153
|
|
14.04 LTS trusty | Not in release | |
linux-raspi2-5.3 | ||
20.04 LTS focal | Not in release | |
18.04 LTS bionic |
Not affected
|
|
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-riscv | ||
20.04 LTS focal |
Not affected
|
|
18.04 LTS bionic | Not in release | |
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-snapdragon | ||
20.04 LTS focal | Not in release | |
18.04 LTS bionic |
Not affected
|
|
16.04 LTS xenial |
Fixed 4.4.0-1147.157
|
|
14.04 LTS trusty | Not in release |
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Patch details
Package | Patch details |
---|---|
linux |
Severity score breakdown
Parameter | Value |
---|---|
Base score | 2.9 · Low |
Attack vector | Local |
Attack complexity | High |
Privileges required | None |
User interaction | None |
Scope | Unchanged |
Confidentiality | Low |
Integrity impact | None |
Availability impact | None |
Vector | CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N |
References
Related Ubuntu Security Notices (USN)
- USN-4657-1
- Linux kernel vulnerabilities
- 2 December 2020
- USN-4658-1
- Linux kernel vulnerabilities
- 3 December 2020
- USN-4659-1
- Linux kernel vulnerabilities
- 2 December 2020
- USN-4660-1
- Linux kernel vulnerabilities
- 3 December 2020
- USN-4681-1
- Linux kernel vulnerabilities
- 6 January 2021