Executive Summary

Informations
Name CVE-2020-27675 First vendor Publication 2020-10-22
Vendor Cve Last vendor Modification 2021-01-19

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Overall CVSS Score 4.7
Base Score 4.7 Environmental Score 4.7
impact SubScore 3.6 Temporal Score 4.7
Exploitabality Sub Score 1
 
Attack Vector Local Attack Complexity High
Privileges Required Low User Interaction None
Scope Unchanged Confidentiality Impact None
Integrity Impact None Availability Impact High
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:L/AC:M/Au:N/C:N/I:N/A:C)
Cvss Base Score 4.7 Attack Range Local
Cvss Impact Score 6.9 Attack Complexity Medium
Cvss Expoit Score 3.4 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

An issue was discovered in the Linux kernel through 5.9.1, as used with Xen through 4.14.x. drivers/xen/events/events_base.c allows event-channel removal during the event-handling loop (a race condition). This can cause a use-after-free or NULL pointer dereference, as demonstrated by a dom0 crash via events for an in-reconfiguration paravirtualized device, aka CID-073d0552ead5.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-27675

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-362 Race Condition

CPE : Common Platform Enumeration

TypeDescriptionCount
Os 3
Os 3360

Sources (Detail)

Source Url
FEDORA https://lists.fedoraproject.org/archives/list/package-announce@lists.fedorapr...
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedorapr...
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedorapr...
GENTOO https://security.gentoo.org/glsa/202011-06
MISC https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=07...
https://github.com/torvalds/linux/commit/073d0552ead5bfc7a3a9c01de590e924f11b...
https://xenbits.xen.org/xsa/advisory-331.html
MLIST http://www.openwall.com/lists/oss-security/2021/01/19/3
https://lists.debian.org/debian-lts-announce/2020/12/msg00015.html
https://lists.debian.org/debian-lts-announce/2020/12/msg00027.html

Alert History

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Date Informations
2021-01-20 00:22:52
  • Multiple Updates
2021-01-14 01:32:23
  • Multiple Updates
2021-01-13 01:31:14
  • Multiple Updates
2020-12-18 17:22:49
  • Multiple Updates
2020-12-15 00:22:51
  • Multiple Updates
2020-12-12 09:22:49
  • Multiple Updates
2020-12-11 05:22:49
  • Multiple Updates
2020-12-09 01:30:48
  • Multiple Updates
2020-12-05 12:31:37
  • Multiple Updates
2020-11-11 12:29:43
  • Multiple Updates
2020-11-04 05:23:00
  • Multiple Updates
2020-11-03 09:22:54
  • Multiple Updates
2020-10-23 17:23:03
  • Multiple Updates
2020-10-23 05:23:03
  • First insertion