CVE-2019-19448

HIGH
New! CVE Severity Now Using CVSS v3

The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Description

In the Linux kernel 5.0.21 and 5.3.11, mounting a crafted btrfs filesystem image, performing some operations, and then making a syncfs system call can lead to a use-after-free in try_merge_free_space in fs/btrfs/free-space-cache.c because the pointer to a left data structure can be the same as the pointer to a right data structure.

References

https://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19448

https://lists.debian.org/debian-lts-announce/2020/09/msg00025.html

https://lists.debian.org/debian-lts-announce/2020/10/msg00032.html

https://lists.debian.org/debian-lts-announce/2020/10/msg00034.html

https://security.netapp.com/advisory/ntap-20200103-0001/

https://usn.ubuntu.com/4578-1/

Details

Source: MITRE

Published: 2019-12-08

Updated: 2020-11-02

Type: CWE-416

Risk Information

CVSS v2

Base Score: 6.8

Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P

Impact Score: 6.4

Exploitability Score: 8.6

Severity: MEDIUM

CVSS v3

Base Score: 7.8

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

Impact Score: 5.9

Exploitability Score: 1.8

Severity: HIGH

Tenable Plugins

View all (6 total)

IDNameProductFamilySeverity
142176Debian DLA-2420-2 : linux regression updateNessusDebian Local Security Checks
high
141961Amazon Linux AMI : kernel (ALAS-2020-1437)NessusAmazon Linux Local Security Checks
high
141789Slackware 14.2 : Slackware 14.2 kernel (SSA:2020-295-01)NessusSlackware Local Security Checks
high
141448Ubuntu 16.04 LTS / 18.04 LTS : Linux kernel vulnerabilities (USN-4578-1)NessusUbuntu Local Security Checks
high
141106Amazon Linux 2 : kernel (ALAS-2020-1495)NessusAmazon Linux Local Security Checks
medium
140933Debian DLA-2385-1 : linux-4.19 security updateNessusDebian Local Security Checks
high