Executive Summary

Informations
Name CVE-2020-36387 First vendor Publication 2021-06-07
Vendor Cve Last vendor Modification 2021-07-30

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Overall CVSS Score 7.8
Base Score 7.8 Environmental Score 7.8
impact SubScore 5.9 Temporal Score 7.8
Exploitabality Sub Score 1.8
 
Attack Vector Local Attack Complexity Low
Privileges Required Low 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

An issue was discovered in the Linux kernel before 5.8.2. fs/io_uring.c has a use-after-free related to io_async_task_func and ctx reference holding, aka CID-6d816e088c35.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-36387

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-416 Use After Free

CPE : Common Platform Enumeration

TypeDescriptionCount
Os 3369

Sources (Detail)

Source Url
MISC https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.2
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id...
https://sites.google.com/view/syzscope/kasan-use-after-free-read-in-io_async_...
https://syzkaller.appspot.com/bug?id=ce5f07d6ec3b5050b8f0728a3b389aa510f2591b

Alert History

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Date Informations
2021-07-30 21:23:22
  • Multiple Updates
2021-06-21 17:22:51
  • Multiple Updates
2021-06-08 05:22:47
  • Multiple Updates
2021-06-08 00:22:47
  • First insertion