CVE-2019-19448

Aliases:UBUNTU-CVE-2019-19448DEBIAN-CVE-2019-19448
Advisory lineage Upstream: 0 Downstream: 6
Modified
Published: 08 Dec 2019, 01:01
Last modified:05 Aug 2024, 02:16

Vulnerability Summary

Overall Risk (default)
medium
42/100
CVSS Score
7.8 HIGH
v3.1 (nvd)
EPSS Score
2.14% LOW
2% probability +1.37%
KEV
Not listed
Ransomware
No reports
Public exploits
1 found
Dark Web
Not detected

Timeline

08 Dec 2019, 01:01
Published
Vulnerability first disclosed
05 Aug 2024, 02:16
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
  • v2.0•MEDIUM•Score: 6.8AV:N/AC:M/Au:N/C:P/I:P/A:P

EPSS Trends

Current EPSS score: 2.14%• Percentile: 81%

Techniques & Countermeasures

  • CWE-416•Use After Free

    The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Affected Systems

  • canonical•ubuntu_linux

    14.04 | 16.04 | 18.04

  • debian•linux

    < 5.7.17-1 | < 5.7.17-1 | < 5.7.17-1 | < 5.7.17-1

  • ubuntu•linux

    all | < 4.4.0-190.220 | < 4.15.0-121.123 | < 5.4.0-48.52

  • ubuntu•linux-aws

    < 4.4.0-1078.82 | < 4.4.0-1114.127 | < 4.15.0-1086.91 | < 5.4.0-1025.25

  • ubuntu•linux-aws-5.0

    all

  • ubuntu•linux-aws-5.3

    all

  • ubuntu•linux-aws-5.4

    < 5.4.0-1025.25~18.04.1

  • ubuntu•linux-aws-fips

    < 4.15.0-2030.31 | all | < 5.4.0-1069.73+fips2

  • ubuntu•linux-aws-hwe

    < 4.15.0-1085.90~16.04.1

  • ubuntu•linux-azure

    < 4.15.0-1098.109~14.04.1 | < 4.15.0-1098.109~16.04.1 | all | < 5.4.0-1026.26

  • ubuntu•linux-azure-4.15

    < 4.15.0-1099.110

  • ubuntu•linux-azure-5.3

    all

  • ubuntu•linux-azure-5.4

    < 5.4.0-1026.26~18.04.1

  • ubuntu•linux-azure-edge

    all

  • ubuntu•linux-azure-fips

    < 4.15.0-2012.14 | all | < 5.4.0-1073.76+fips1

  • ubuntu•linux-bluefield

    all

  • ubuntu•linux-fips

    < 4.4.0-1046.51 | all | < 4.15.0-1044.50

  • ubuntu•linux-gcp

    < 4.15.0-1086.98~16.04.1 | all | < 5.4.0-1025.25

  • ubuntu•linux-gcp-4.15

    < 4.15.0-1086.98

  • ubuntu•linux-gcp-5.3

    all

  • ubuntu•linux-gcp-5.4

    < 5.4.0-1025.25~18.04.1

  • ubuntu•linux-gcp-edge

    all

  • ubuntu•linux-gcp-fips

    all | < 5.4.0-1067.71~20.04.1

  • ubuntu•linux-gke-4.15

    < 4.15.0-1072.76

  • ubuntu•linux-hwe

    < 4.15.0-120.122~16.04.1 | all

  • ubuntu•linux-hwe-5.4

    < 5.4.0-48.52~18.04.1

  • ubuntu•linux-hwe-edge

    all | all

  • ubuntu•linux-intel-iot-realtime

    all

  • ubuntu•linux-kvm

    < 4.4.0-1080.87 | < 4.15.0-1077.79 | < 5.4.0-1024.24

  • ubuntu•linux-lts-xenial

    < 4.4.0-190.220~14.04.1

  • ubuntu•linux-oem

    < 4.15.0-1099.109

  • ubuntu•linux-oem-5.6

    all

  • ubuntu•linux-oracle

    < 4.15.0-1056.61~16.04.1 | < 4.15.0-1057.62 | < 5.4.0-1025.25

  • ubuntu•linux-oracle-5.0

    all

  • ubuntu•linux-oracle-5.3

    all

  • ubuntu•linux-oracle-5.4

    < 5.4.0-1025.25~18.04.1

  • ubuntu•linux-raspi

    < 5.4.0-1019.21

  • ubuntu•linux-raspi-5.4

    < 5.4.0-1019.21~18.04.1

  • ubuntu•linux-raspi-realtime

    all

  • ubuntu•linux-raspi2

    < 4.4.0-1139.148 | < 4.15.0-1073.78 | all

  • ubuntu•linux-realtime

    all

  • ubuntu•linux-riscv

    < 5.4.0-34.38

  • ubuntu•linux-snapdragon

    < 4.4.0-1143.152 | < 4.15.0-1089.98

  • debian•debian_linux

    9.0

  • linux•linux_kernel

    ≥ 2.6.31, < 4.4.233 | ≥ 4.5.0, < 4.9.233 | ≥ 4.10, < 4.14.194 | ≥ 4.15, < 4.19.141 | ≥ 4.20, < 5.4.60 | ≥ 5.5.0, < 5.7.17 | ≥ 5.8, < 5.8.3

  • netapp•a700s_firmware

    na

  • netapp•active_iq_unified_manager

    na

  • netapp•aff_8300_firmware

    na

  • netapp•aff_8700_firmware

    na

  • netapp•aff_a400_firmware

    na

Showing first 50 affected entries in server-rendered view.

References (10)