CVE-2019-19813
Publication date 17 December 2019
Last updated 24 July 2024
Ubuntu priority
Cvss 3 Severity Score
In the Linux kernel 5.0.21, mounting a crafted btrfs filesystem image, performing some operations, and then making a syncfs system call can lead to a use-after-free in __mutex_lock in kernel/locking/mutex.c. This is related to mutex_can_spin_on_owner in kernel/locking/mutex.c, __btrfs_qgroup_free_meta in fs/btrfs/qgroup.c, and btrfs_insert_delayed_items in fs/btrfs/delayed-inode.c.
From the Ubuntu Security Team
It was discovered that the btrfs file system implementation in the Linux kernel did not properly validate file system metadata in some situations. An attacker could use this to construct a malicious btrfs image that, when mounted, could cause a denial of service (system crash).
Status
Package | Ubuntu Release | Status |
---|---|---|
linux | ||
20.04 LTS focal |
Not affected
|
|
18.04 LTS bionic |
Fixed 4.15.0-109.110
|
|
16.04 LTS xenial |
Fixed 4.4.0-201.233
|
|
14.04 LTS trusty | Ignored | |
linux-aws | ||
20.04 LTS focal |
Not affected
|
|
18.04 LTS bionic |
Fixed 4.15.0-1077.81
|
|
16.04 LTS xenial |
Fixed 4.4.0-1121.135
|
|
14.04 LTS trusty |
Fixed 4.4.0-1085.89
|
|
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 |
Not affected
|
|
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 |
Not affected
|
|
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 |
Fixed 4.15.0-1079.83~16.04.1
|
|
14.04 LTS trusty | Not in release | |
linux-azure | ||
20.04 LTS focal |
Not affected
|
|
18.04 LTS bionic | Ignored | |
16.04 LTS xenial |
Fixed 4.15.0-1091.101~16.04.1
|
|
14.04 LTS trusty |
Fixed 4.15.0-1091.101~14.04.1
|
|
linux-azure-4.15 | ||
20.04 LTS focal | Not in release | |
18.04 LTS bionic |
Fixed 4.15.0-1091.101
|
|
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 |
Not affected
|
|
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 |
Not affected
|
|
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 |
Not affected
|
|
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-gcp | ||
20.04 LTS focal |
Not affected
|
|
18.04 LTS bionic | Ignored | |
16.04 LTS xenial |
Fixed 4.15.0-1080.90~16.04.1
|
|
14.04 LTS trusty | Not in release | |
linux-gcp-4.15 | ||
20.04 LTS focal | Not in release | |
18.04 LTS bionic |
Fixed 4.15.0-1080.90
|
|
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 |
Not affected
|
|
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 |
Not affected
|
|
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 |
Fixed 4.15.0-1066.69
|
|
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 | Ignored | |
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 |
Not affected
|
|
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 |
Not affected
|
|
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 |
Fixed 5.3.0-26.28~18.04.1
|
|
16.04 LTS xenial |
Fixed 4.15.0-112.113~16.04.1
|
|
14.04 LTS trusty | Not in release | |
linux-hwe-5.4 | ||
20.04 LTS focal | Not in release | |
18.04 LTS bionic |
Not affected
|
|
16.04 LTS xenial | Not in release | |
14.04 LTS trusty | Not in release | |
linux-hwe-5.8 | ||
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-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 |
Not affected
|
|
18.04 LTS bionic |
Fixed 4.15.0-1069.70
|
|
16.04 LTS xenial |
Fixed 4.4.0-1087.96
|
|
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 4.4.0-201.233~14.04.1
|
|
linux-oem | ||
20.04 LTS focal | Not in release | |
18.04 LTS bionic |
Fixed 4.15.0-1091.101
|
|
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 |
Not affected
|
|
18.04 LTS bionic |
Fixed 4.15.0-1048.52
|
|
16.04 LTS xenial |
Fixed 4.15.0-1050.54~16.04.1
|
|
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 |
Not affected
|
|
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 |
Not affected
|
|
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 |
Fixed 4.15.0-1065.69
|
|
16.04 LTS xenial |
Fixed 4.4.0-1145.155
|
|
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 |
Fixed 4.15.0-1083.91
|
|
16.04 LTS xenial |
Fixed 4.4.0-1149.159
|
|
14.04 LTS trusty | Not in release |
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Severity score breakdown
Parameter | Value |
---|---|
Base score | 5.5 · Medium |
Attack vector | Local |
Attack complexity | Low |
Privileges required | None |
User interaction | Required |
Scope | Unchanged |
Confidentiality | None |
Integrity impact | None |
Availability impact | High |
Vector | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
References
Related Ubuntu Security Notices (USN)
- USN-4414-1
- Linux kernel vulnerabilities
- 6 July 2020
- USN-4708-1
- Linux kernel vulnerabilities
- 28 January 2021
- USN-4709-1
- Linux kernel vulnerabilities
- 2 February 2021