Executive Summary

Informations
Name CVE-2019-15794 First vendor Publication 2020-04-24
Vendor Cve Last vendor Modification 2020-05-26

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Overall CVSS Score 6.7
Base Score 6.7 Environmental Score 6.7
impact SubScore 5.9 Temporal Score 6.7
Exploitabality Sub Score 0.8
 
Attack Vector Local Attack Complexity Low
Privileges Required High User Interaction None
Scope Unchanged Confidentiality Impact High
Integrity Impact High Availability Impact High
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:L/AC:L/Au:N/C:C/I:C/A:C)
Cvss Base Score 7.2 Attack Range Local
Cvss Impact Score 10 Attack Complexity Low
Cvss Expoit Score 3.9 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

Overlayfs in the Linux kernel and shiftfs, a non-upstream patch to the Linux kernel included in the Ubuntu 5.0 and 5.3 kernel series, both replace vma->vm_file in their mmap handlers. On error the original value is not restored, and the reference is put for the file to which vm_file points. On upstream kernels this is not an issue, as no callers dereference vm_file following after call_mmap() returns an error. However, the aufs patchs change mmap_region() to replace the fput() using a local variable with vma_fput(), which will fput() vm_file, leading to a refcount underflow.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-15794

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-672 Operation on a Resource after Expiration or Release

CPE : Common Platform Enumeration

TypeDescriptionCount
Os 2
Os 2

Sources (Detail)

Source Url
MISC https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/eoan/commi...
https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/eoan/commi...
https://usn.ubuntu.com/usn/usn-4208-1
https://usn.ubuntu.com/usn/usn-4209-1

Alert History

If you want to see full details history, please login or register.
0
1
Date Informations
2020-05-26 21:23:12
  • Multiple Updates
2020-05-23 02:25:40
  • First insertion