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CVE-2019-19807

Publication date 15 December 2019

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

7.8 · High

Score breakdown

In the Linux kernel before 5.3.11, sound/core/timer.c has a use-after-free caused by erroneous code refactoring, aka CID-e7af6307a8a5. This is related to snd_timer_open and snd_timer_close_locked. The timeri variable was originally intended to be for a newly created timer instance, but was used for a different purpose after refactoring.

From the Ubuntu Security Team

Tristan Madani discovered that the ALSA timer implementation in the Linux kernel contained a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.

Status

Package Ubuntu Release Status
linux 19.10 eoan
Fixed 5.3.0-26.28
19.04 disco
Not affected
18.04 LTS bionic
Fixed 4.15.0-74.84
16.04 LTS xenial
Not affected
14.04 LTS trusty
Not affected
linux-aws 19.10 eoan
Fixed 5.3.0-1009.10
19.04 disco
Not affected
18.04 LTS bionic
Fixed 4.15.0-1057.59
16.04 LTS xenial
Not affected
14.04 LTS trusty
Not affected
linux-aws-5.0 19.10 eoan Not in release
19.04 disco Not in release
18.04 LTS bionic
Not affected
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
linux-aws-hwe 19.10 eoan Not in release
19.04 disco Not in release
18.04 LTS bionic Not in release
16.04 LTS xenial
Fixed 4.15.0-1057.59~16.04.1
14.04 LTS trusty Not in release
linux-azure 19.10 eoan
Fixed 5.3.0-1009.10
19.04 disco
Not affected
18.04 LTS bionic
Not affected
16.04 LTS xenial
Fixed 4.15.0-1066.71
14.04 LTS trusty
linux-azure-5.3 19.10 eoan Not in release
19.04 disco Not in release
18.04 LTS bionic
Fixed 5.3.0-1009.10~18.04.1
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
linux-azure-edge 19.10 eoan Not in release
19.04 disco Not in release
18.04 LTS bionic Ignored
16.04 LTS xenial Ignored
14.04 LTS trusty Not in release
linux-gcp 19.10 eoan
Fixed 5.3.0-1011.12
19.04 disco
Not affected
18.04 LTS bionic
Not affected
16.04 LTS xenial
Fixed 4.15.0-1052.56
14.04 LTS trusty Not in release
linux-gcp-5.3 19.10 eoan Not in release
19.04 disco Not in release
18.04 LTS bionic
Fixed 5.3.0-1010.11~18.04.1
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
linux-gcp-edge 19.10 eoan Not in release
19.04 disco 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 19.10 eoan Not in release
19.04 disco Not in release
18.04 LTS bionic
Fixed 4.15.0-1050.53
16.04 LTS xenial Not in release
14.04 LTS trusty Not in release
linux-gke-5.0 19.10 eoan Not in release
19.04 disco 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
19.04 disco Not in release
18.04 LTS bionic
Not affected
16.04 LTS xenial
Fixed 4.15.0-74.83~16.04.1
14.04 LTS trusty Not in release
linux-hwe-edge 19.10 eoan Not in release
19.04 disco Not in release
18.04 LTS bionic Ignored
16.04 LTS xenial Ignored
14.04 LTS trusty Not in release
linux-kvm 19.10 eoan
Fixed 5.3.0-1009.10
19.04 disco
Not affected
18.04 LTS bionic
Fixed 4.15.0-1052.52
16.04 LTS xenial
Not affected
14.04 LTS trusty Not in release
linux-lts-trusty 19.10 eoan Not in release
19.04 disco 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
19.04 disco 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 4.15.0-1066.76
19.04 disco Ignored
18.04 LTS bionic
Fixed 4.15.0-1066.76
16.04 LTS xenial Ignored
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
19.04 disco
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
Fixed 5.3.0-1008.9
19.04 disco
Not affected
18.04 LTS bionic
Fixed 4.15.0-1031.34
16.04 LTS xenial
Fixed 4.15.0-1031.34~16.04.1
14.04 LTS trusty Not in release
linux-oracle-5.0 19.10 eoan Not in release
19.04 disco 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
Fixed 5.3.0-1015.17
19.04 disco
Not affected
18.04 LTS bionic
Fixed 4.15.0-1053.57
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
19.04 disco
Not affected
18.04 LTS bionic
Fixed 4.15.0-1070.77
16.04 LTS xenial
Not affected
14.04 LTS trusty Not in release

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Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
linux

Severity score breakdown

Parameter Value
Base score 7.8 · High
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H