Bug 2213485 (CVE-2023-3161) - CVE-2023-3161 kernel: fbcon: shift-out-of-bounds in fbcon_set_font()
Summary: CVE-2023-3161 kernel: fbcon: shift-out-of-bounds in fbcon_set_font()
Keywords:
Status: NEW
Alias: CVE-2023-3161
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Nobody
QA Contact:
URL:
Whiteboard:
Depends On: 2213490 2213491 2213492 2213493 2213494 2233507 2233508
Blocks: 2213488
TreeView+ depends on / blocked
 
Reported: 2023-06-08 10:47 UTC by Mauro Matteo Cascella
Modified: 2024-02-13 01:12 UTC (History)
44 users (show)

Fixed In Version: kernel 6.2-rc7
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in the Framebuffer Console (fbcon) in the Linux Kernel. When providing a font->width and font->height greater than 32 to the fbcon_set_font, since there are no checks in place, a shift-out-of-bounds occurs, leading to undefined behavior and possible denial of service.
Clone Of:
Environment:
Last Closed:
Embargoed:

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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2023:6835 0 None None None 2023-11-09 07:10:56 UTC
Red Hat Product Errata RHBA-2023:7268 0 None None None 2023-11-15 18:24:52 UTC
Red Hat Product Errata RHBA-2023:7328 0 None None None 2023-11-16 11:39:02 UTC
Red Hat Product Errata RHBA-2023:7338 0 None None None 2023-11-16 18:04:24 UTC
Red Hat Product Errata RHBA-2023:7343 0 None None None 2023-11-20 01:58:54 UTC
Red Hat Product Errata RHBA-2023:7346 0 None None None 2023-11-20 09:25:54 UTC
Red Hat Product Errata RHSA-2023:5603 0 None None None 2023-10-10 15:25:06 UTC
Red Hat Product Errata RHSA-2023:5604 0 None None None 2023-10-10 15:33:13 UTC
Red Hat Product Errata RHSA-2023:6583 0 None None None 2023-11-07 08:20:29 UTC
Red Hat Product Errata RHSA-2023:6901 0 None None None 2023-11-14 15:15:40 UTC
Red Hat Product Errata RHSA-2023:7077 0 None None None 2023-11-14 15:21:02 UTC
Red Hat Product Errata RHSA-2024:0412 0 None None None 2024-01-24 16:43:53 UTC

Description Mauro Matteo Cascella 2023-06-08 10:47:23 UTC 
A flaw was found in the Framebuffer Console (fbcon) in the Linux Kernel. When providing font->width and font->height greater than 32 to fbcon_set_font, since there are no checks in place, a shift-out-of-bounds occurs leading to undefined behavior and possible denial of service.

Upstream fix:
https://github.com/torvalds/linux/commit/2b09d5d364986f724f17001ccfe4126b9b43a0be
Comment 1 Mauro Matteo Cascella 2023-06-08 10:59:48 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2213490]
Comment 3 Justin M. Forbes 2023-06-09 14:34:10 UTC 
This was fixed for Fedora with the 6.1.11 stable kernel updates.
Comment 7 errata-xmlrpc 2023-10-10 15:25:02 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.0 Extended Update Support

Via RHSA-2023:5603 https://access.redhat.com/errata/RHSA-2023:5603
Comment 8 errata-xmlrpc 2023-10-10 15:33:09 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.0 Extended Update Support

Via RHSA-2023:5604 https://access.redhat.com/errata/RHSA-2023:5604
Comment 9 errata-xmlrpc 2023-11-07 08:20:24 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2023:6583 https://access.redhat.com/errata/RHSA-2023:6583
Comment 10 errata-xmlrpc 2023-11-14 15:15:36 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2023:6901 https://access.redhat.com/errata/RHSA-2023:6901
Comment 11 errata-xmlrpc 2023-11-14 15:20:58 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2023:7077 https://access.redhat.com/errata/RHSA-2023:7077
Comment 12 errata-xmlrpc 2024-01-24 16:43:50 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Extended Update Support

Via RHSA-2024:0412 https://access.redhat.com/errata/RHSA-2024:0412
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