CVE-2019-19813 Information

Description

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.

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Reference

https://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19813 https://lists.debian.org/debian-lts-announce/2020/09/msg00025.html https://security.netapp.com/advisory/ntap-20200103-0001/ https://usn.ubuntu.com/4414-1/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

5.5