Bug 1901161 (CVE-2020-15437) - CVE-2020-15437 kernel: NULL pointer dereference in serial8250_isa_init_ports function in drivers/tty/serial/8250/8250_core.c
Summary: CVE-2020-15437 kernel: NULL pointer dereference in serial8250_isa_init_ports ...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2020-15437
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: 1901162 1903272 1905052 1905053
Blocks: 1901164
TreeView+ depends on / blocked
 
Reported: 2020-11-24 16:19 UTC by Guilherme de Almeida Suckevicz
Modified: 2021-06-24 11:51 UTC (History)
45 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2021-05-18 20:37:16 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2021:2538 0 None None None 2021-06-23 18:06:12 UTC
Red Hat Product Errata RHBA-2021:2541 0 None None None 2021-06-24 11:51:29 UTC

Description Guilherme de Almeida Suckevicz 2020-11-24 16:19:06 UTC 
The Linux kernel before version 5.8 is vulnerable to a NULL pointer dereference in drivers/tty/serial/8250/8250_core.c:serial8250_isa_init_ports() that allows local users to cause a denial of service by using the p->serial_in pointer which uninitialized.

Reference:
https://lkml.org/lkml/2020/7/21/80
Comment 1 Guilherme de Almeida Suckevicz 2020-11-24 16:20:59 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1901162]
Comment 2 Justin M. Forbes 2020-11-25 14:42:38 UTC 
This was fixed for Fedora with the 5.7.11 stable kernel updates.
Comment 4 Alex 2020-12-01 18:02:48 UTC 
Statement:

This flaw is rated as having a Moderate impact because the issue can only be triggered by an authorized local user in the tty or in the dialout group.
Comment 8 errata-xmlrpc 2021-05-18 13:20:37 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:1578 https://access.redhat.com/errata/RHSA-2021:1578
Comment 9 errata-xmlrpc 2021-05-18 14:40:56 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:1739 https://access.redhat.com/errata/RHSA-2021:1739
Comment 10 Product Security DevOps Team 2021-05-18 20:37:16 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-2020-15437
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