Bug 2026074 (CVE-2021-4011) - CVE-2021-4011 xorg-x11-server: SwapCreateRegister out-of-bounds access
Summary: CVE-2021-4011 xorg-x11-server: SwapCreateRegister out-of-bounds access
Alias: CVE-2021-4011
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
Depends On: 2030179 2030180 2030181 2032945 2038073 2038074
Blocks: 2026049 2026076
TreeView+ depends on / blocked
Reported: 2021-11-23 17:33 UTC by Guilherme de Almeida Suckevicz
Modified: 2022-05-17 10:00 UTC (History)
11 users (show)

Fixed In Version: xorg-x11-server 21.1.2, xorg-x11-server 1.20.14
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in xorg-x11-server where an out-of-bounds access can occur in the SwapCreateRegister function.
Clone Of:
Last Closed: 2022-01-03 11:12:09 UTC

Attachments (Terms of Use)

System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2022:0003 0 None None None 2022-01-03 10:21:52 UTC
Red Hat Product Errata RHSA-2022:1917 0 None None None 2022-05-10 14:18:23 UTC

Description Guilherme de Almeida Suckevicz 2021-11-23 17:33:45 UTC
As per upstream:

The handlers for the RecordCreateContext and RecordRegisterClients requests of the Record extension do not properly validate the request length leading to out of bounds memory write.

Comment 2 Guilherme de Almeida Suckevicz 2021-12-15 14:21:37 UTC
Created xorg-x11-server tracking bugs for this issue:

Affects: fedora-all [bug 2032945]

Comment 3 errata-xmlrpc 2022-01-03 10:21:50 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2022:0003 https://access.redhat.com/errata/RHSA-2022:0003

Comment 4 Product Security DevOps Team 2022-01-03 11:12:07 UTC
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):


Comment 5 errata-xmlrpc 2022-05-10 14:18:21 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2022:1917 https://access.redhat.com/errata/RHSA-2022:1917

Note You need to log in before you can comment on or make changes to this bug.