CVE-2020-8832

Publication date 5 March 2020

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

5.5 · Medium

Score breakdown

The fix for the Linux kernel in Ubuntu 18.04 LTS for CVE-2019-14615 ("The Linux kernel did not properly clear data structures on context switches for certain Intel graphics processors.") was discovered to be incomplete, meaning that in versions of the kernel before 4.15.0-91.92, an attacker could use this vulnerability to expose sensitive information.

From the Ubuntu Security Team

Gregory Herrero discovered that the fix for CVE-2019-14615 to address the Linux kernel not properly clearing data structures on context switches for certain Intel graphics processors was incomplete. A local attacker could use this to expose sensitive information.

Read the notes from the security team

Status

Package Ubuntu Release Status
linux 19.10 eoan
Not affected
18.04 LTS bionic
Fixed 4.15.0-91.92
16.04 LTS xenial
Not affected
14.04 LTS trusty
Not affected
linux-aws 19.10 eoan
Not affected
18.04 LTS bionic
Fixed 4.15.0-1063.67
16.04 LTS xenial
Not affected
14.04 LTS trusty Ignored end of ESM support, was ignored [was needs-triage ESM criteria]
linux-aws-5.0 19.10 eoan Not in release
18.04 LTS bionic Ignored end of life, was needs-triage
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
linux-aws-hwe 19.10 eoan Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial
Fixed 4.15.0-1063.67~16.04.1
14.04 LTS trusty Not in release
linux-azure 19.10 eoan
Not affected
18.04 LTS bionic Ignored end of life, was needs-triage
16.04 LTS xenial
Fixed 4.15.0-1075.80
14.04 LTS trusty
linux-azure-5.3 19.10 eoan 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-edge 19.10 eoan Not in release
18.04 LTS bionic Ignored end of life, was needs-triage
16.04 LTS xenial Ignored end of standard support, was needs-triage
14.04 LTS trusty Not in release
linux-gcp 19.10 eoan
Not affected
18.04 LTS bionic
Not affected
16.04 LTS xenial
Fixed 4.15.0-1058.62
14.04 LTS trusty Not in release
linux-gcp-5.3 19.10 eoan 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-edge 19.10 eoan Not in release
18.04 LTS bionic Ignored end of life, was needs-triage
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
linux-gke-4.15 19.10 eoan Not in release
18.04 LTS bionic
Fixed 4.15.0-1055.58
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
linux-gke-5.0 19.10 eoan 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 19.10 eoan Not in release
18.04 LTS bionic
Not affected
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
linux-hwe 19.10 eoan Not in release
18.04 LTS bionic
Not affected
16.04 LTS xenial
Fixed 4.15.0-91.92~16.04.1
14.04 LTS trusty Not in release
linux-hwe-edge 19.10 eoan Not in release
18.04 LTS bionic Ignored end of life, was needs-triage
16.04 LTS xenial Ignored end of life, was needs-triage
14.04 LTS trusty Not in release
linux-kvm 19.10 eoan
Not affected
18.04 LTS bionic
Fixed 4.15.0-1056.57
16.04 LTS xenial
Not affected
14.04 LTS trusty Not in release
linux-lts-trusty 19.10 eoan 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 19.10 eoan Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial Not in release
14.04 LTS trusty
Not affected
linux-oem 19.10 eoan
Fixed 4.15.0-1076.86
18.04 LTS bionic
Fixed 4.15.0-1076.86
16.04 LTS xenial Ignored end of standard support, was needs-triage
14.04 LTS trusty Not in release
linux-oem-5.4 19.10 eoan 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-oem-osp1 19.10 eoan
Not affected
18.04 LTS bionic
Not affected
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
linux-oracle 19.10 eoan
Not affected
18.04 LTS bionic
Fixed 4.15.0-1035.39
16.04 LTS xenial
Fixed 4.15.0-1035.38~16.04.1
14.04 LTS trusty Not in release
linux-oracle-5.0 19.10 eoan Not in release
18.04 LTS bionic
Not affected
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
linux-oracle-5.3 19.10 eoan 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 19.10 eoan
Not affected
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty Not in release
linux-raspi2-5.3 19.10 eoan Not in release
18.04 LTS bionic
Not affected
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
linux-snapdragon 19.10 eoan Not in release
18.04 LTS bionic
Not affected
16.04 LTS xenial
Not affected
14.04 LTS trusty Not in release

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Notes

sbeattie

this issue is Ubuntu specific and only affects 4.15 kernels.

Severity score breakdown

Parameter Value
Base score 5.5 · Medium
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

Related Ubuntu Security Notices (USN)

    • USN-4302-1
    • Linux kernel vulnerabilities
    • 25 March 2020

Other references