CVE-2019-19377

Description

In the Linux kernel 5.0.21, mounting a crafted btrfs filesystem image, performing some operations, and unmounting can lead to a use-after-free in btrfs_queue_work in fs/btrfs/async-thread.c.

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: 0.39%• Percentile: 61%

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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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

• linux•linux_kernel

  ≥ 2.6.12, < 4.19.156 | ≥ 4.20, < 5.4.33 | ≥ 5.5.0, < 5.5.18 | ≥ 5.6, < 5.6.5

• netapp•active_iq_unified_manager

  na

• netapp•cloud_backup

  na

• netapp•solidfire_baseboard_management_controller_firmware

  na

• netapp•steelstore_cloud_integrated_storage

  na

References (6)

• https://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19377
• https://security.netapp.com/advisory/ntap-20200103-0001/
• https://usn.ubuntu.com/4367-1/
• https://usn.ubuntu.com/4369-1/
• https://usn.ubuntu.com/4414-1/
• https://lists.debian.org/debian-lts-announce/2020/12/msg00015.html