CVE-2019-19770

Advisory lineage Upstream: 0 Downstream: 17
Modified
Published: 12 Dec 2019, 19:39
Last modified:05 Aug 2024, 02:25

Vulnerability Summary

Overall Risk (default)
medium
43/100
CVSS Score
8.2 HIGH
v3.1 (nvd)
EPSS Score
1.12% LOW
1% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
1 found
Dark Web
Not detected

Timeline

12 Dec 2019, 19:39
Published
Vulnerability first disclosed
05 Aug 2024, 02:25
Last Modified
Vulnerability information updated

Description

In the Linux kernel 4.19.83, there is a use-after-free (read) in the debugfs_remove function in fs/debugfs/inode.c (which is used to remove a file or directory in debugfs that was previously created with a call to another debugfs function such as debugfs_create_file). NOTE: Linux kernel developers dispute this issue as not being an issue with debugfs, instead this is an issue with misuse of debugfs within blktrace

CVSS Metrics

  • v3.1•HIGH•Score: 8.2CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
  • v2.0•MEDIUM•Score: 6.4AV:N/AC:L/Au:N/C:P/I:N/A:P

EPSS Trends

Current EPSS score: 1.12%• Percentile: 79%

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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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

    ≤ 4.19.83

References (5)