Rapid7 Vulnerability & Exploit Database

Ubuntu: USN-4578-1 (CVE-2019-19448): Linux kernel vulnerabilities

Back to Search

Ubuntu: USN-4578-1 (CVE-2019-19448): Linux kernel vulnerabilities

Severity
7
CVSS
(AV:N/AC:M/Au:N/C:P/I:P/A:P)
Published
12/08/2019
Created
10/16/2020
Added
10/14/2020
Modified
02/25/2021

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.

Solution(s)

  • ubuntu-upgrade-linux-image-4-15-0-1056-oracle
  • ubuntu-upgrade-linux-image-4-15-0-1057-oracle
  • ubuntu-upgrade-linux-image-4-15-0-1072-gke
  • ubuntu-upgrade-linux-image-4-15-0-1073-raspi2
  • ubuntu-upgrade-linux-image-4-15-0-1077-kvm
  • ubuntu-upgrade-linux-image-4-15-0-1085-aws
  • ubuntu-upgrade-linux-image-4-15-0-1086-aws
  • ubuntu-upgrade-linux-image-4-15-0-1086-gcp
  • ubuntu-upgrade-linux-image-4-15-0-1089-snapdragon
  • ubuntu-upgrade-linux-image-4-15-0-1098-azure
  • ubuntu-upgrade-linux-image-4-15-0-1099-azure
  • ubuntu-upgrade-linux-image-4-15-0-1099-oem
  • ubuntu-upgrade-linux-image-4-15-0-120-generic
  • ubuntu-upgrade-linux-image-4-15-0-120-generic-lpae
  • ubuntu-upgrade-linux-image-4-15-0-120-lowlatency
  • ubuntu-upgrade-linux-image-4-15-0-121-generic
  • ubuntu-upgrade-linux-image-4-15-0-121-generic-lpae
  • ubuntu-upgrade-linux-image-4-15-0-121-lowlatency
  • ubuntu-upgrade-linux-image-aws-hwe
  • ubuntu-upgrade-linux-image-aws-lts-18-04
  • ubuntu-upgrade-linux-image-azure
  • ubuntu-upgrade-linux-image-azure-lts-18-04
  • ubuntu-upgrade-linux-image-gcp
  • ubuntu-upgrade-linux-image-gcp-lts-18-04
  • ubuntu-upgrade-linux-image-generic
  • ubuntu-upgrade-linux-image-generic-hwe-16-04
  • ubuntu-upgrade-linux-image-generic-lpae
  • ubuntu-upgrade-linux-image-generic-lpae-hwe-16-04
  • ubuntu-upgrade-linux-image-gke
  • ubuntu-upgrade-linux-image-gke-4-15
  • ubuntu-upgrade-linux-image-kvm
  • ubuntu-upgrade-linux-image-lowlatency
  • ubuntu-upgrade-linux-image-lowlatency-hwe-16-04
  • ubuntu-upgrade-linux-image-oem
  • ubuntu-upgrade-linux-image-oracle
  • ubuntu-upgrade-linux-image-oracle-lts-18-04
  • ubuntu-upgrade-linux-image-powerpc-e500mc
  • ubuntu-upgrade-linux-image-powerpc-smp
  • ubuntu-upgrade-linux-image-powerpc64-emb
  • ubuntu-upgrade-linux-image-powerpc64-smp
  • ubuntu-upgrade-linux-image-raspi2
  • ubuntu-upgrade-linux-image-snapdragon
  • ubuntu-upgrade-linux-image-virtual
  • ubuntu-upgrade-linux-image-virtual-hwe-16-04

With Rapid7 live dashboards, I have a clear view of all the assets on my network, which ones can be exploited, and what I need to do in order to reduce the risk in my environment in real-time. No other tool gives us that kind of value and insight.

– Scott Cheney, Manager of Information Security, Sierra View Medical Center

;