Bug 1802559 (CVE-2020-8648) - CVE-2020-8648 kernel: use-after-free in n_tty_receive_buf_common function in drivers/tty/n_tty.c
Summary: CVE-2020-8648 kernel: use-after-free in n_tty_receive_buf_common function in ...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2020-8648
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1802560 1831034 1831036 1831037 1831038 1831039 1980467 1980468 1980469 1980470
Blocks: 1802566
TreeView+ depends on / blocked
 
Reported: 2020-02-13 12:00 UTC by Dhananjay Arunesh
Modified: 2023-12-15 17:19 UTC (History)
46 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
A use-after-free flaw was found in the Linux kernel console driver when using the copy-paste buffer. This flaw allows a local user to crash the system.
Clone Of:
Environment:
Last Closed: 2020-11-04 02:24:20 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2021:2362 0 None None None 2021-06-09 11:51:37 UTC
Red Hat Product Errata RHSA-2020:4431 0 None None None 2020-11-04 00:50:34 UTC
Red Hat Product Errata RHSA-2020:4609 0 None None None 2020-11-04 02:22:42 UTC
Red Hat Product Errata RHSA-2021:2314 0 None None None 2021-06-08 22:31:21 UTC
Red Hat Product Errata RHSA-2021:2316 0 None None None 2021-06-08 22:32:40 UTC
Red Hat Product Errata RHSA-2021:3320 0 None None None 2021-08-31 08:24:46 UTC
Red Hat Product Errata RHSA-2021:3522 0 None None None 2021-09-14 08:44:15 UTC

Description Dhananjay Arunesh 2020-02-13 12:00:29 UTC 
There is a use-after-free vulnerability in the Linux kernel in the n_tty_receive_buf_common function in drivers/tty/n_tty.c.

Reference:
https://bugzilla.kernel.org/show_bug.cgi?id=206361
Comment 1 Dhananjay Arunesh 2020-02-13 12:02:08 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1802560]
Comment 2 Justin M. Forbes 2020-03-20 15:45:26 UTC 
This issue was fixed for Fedora with the 5.5.9 stable kernel updates.
Comment 7 Alex 2020-05-04 13:44:33 UTC 
Statement:

The impact is moderate, because of the need of additional privileges (usually local console user).
Comment 9 Alex 2020-05-04 14:02:59 UTC 
Mitigation:

Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Comment 10 errata-xmlrpc 2020-11-04 00:50:31 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2020:4431 https://access.redhat.com/errata/RHSA-2020:4431
Comment 11 errata-xmlrpc 2020-11-04 02:22:39 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2020:4609 https://access.redhat.com/errata/RHSA-2020:4609
Comment 12 Product Security DevOps Team 2020-11-04 02:24:20 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2020-8648
Comment 13 errata-xmlrpc 2021-06-08 22:31:19 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2021:2314 https://access.redhat.com/errata/RHSA-2021:2314
Comment 14 errata-xmlrpc 2021-06-08 22:32:37 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2021:2316 https://access.redhat.com/errata/RHSA-2021:2316
Comment 16 errata-xmlrpc 2021-08-31 08:24:43 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.6 Advanced Update Support
  Red Hat Enterprise Linux 7.6 Update Services for SAP Solutions
  Red Hat Enterprise Linux 7.6 Telco Extended Update Support

Via RHSA-2021:3320 https://access.redhat.com/errata/RHSA-2021:3320
Comment 18 errata-xmlrpc 2021-09-14 08:44:12 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.7 Advanced Update Support
  Red Hat Enterprise Linux 7.7 Update Services for SAP Solutions
  Red Hat Enterprise Linux 7.7 Telco Extended Update Support

Via RHSA-2021:3522 https://access.redhat.com/errata/RHSA-2021:3522
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