This bug was fixed in the package xorg-server -
2:1.20.13-1ubuntu1~20.04.2
---------------
xorg-server (2:1.20.13-1ubuntu1~20.04.2) focal-security; urgency=medium
* SECURITY UPDATE: SProcRenderCompositeGlyphs out-of-bounds access
- debian/patches/CVE-2021-4008.patch: check lengths in render/render.c.
- CVE-2021-4008
* SECURITY UPDATE: SProcXFixesCreatePointerBarrier out-of-bounds access
- debian/patches/CVE-2021-4009.patch: use sizes in xfixes/cursor.c.
- CVE-2021-4009
* SECURITY UPDATE: SProcScreenSaverSuspend out-of-bounds access
- debian/patches/CVE-2021-4010.patch: fix logic in Xext/saver.c.
- CVE-2021-4010
* SECURITY UPDATE: SwapCreateRegister out-of-bounds access
- debian/patches/CVE-2021-4011.patch: fix length in record/record.c.
- CVE-2021-4011
-- Marc Deslauriers <[email protected]> Tue, 14 Dec 2021
09:14:13 -0500
** Changed in: xorg-server (Ubuntu Focal)
Status: Fix Committed => Fix Released
** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2021-4008
** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2021-4009
** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2021-4010
** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2021-4011
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Packages, which is subscribed to xorg-server in Ubuntu.
https://bugs.launchpad.net/bugs/1947820
Title:
[SRU] Backport xorg-server 1.20.13 to focal
Status in amd:
New
Status in OEM Priority Project:
Triaged
Status in xorg-server package in Ubuntu:
Invalid
Status in xorg-server source package in Focal:
Fix Released
Bug description:
[Impact]
The delay phenomenon is serious in 'External display mode' during the
'On-demand' mode working.
Please reference lp:1940247 and lp:1919118.
[Fix]
I installed 21.10 on Raptor12(ThinkPad-P15-Gen-2i), with xorg-server
2:1.20.13-1ubuntu1 and nvidia-495.38 test driver, this issue is solved. But in
20.04, it's still 2:1.20.11-1ubuntu1~20.04.2.
[Test]
On Raptor12(ThinkPad-P15-Gen-2i), P17 Gen 2 and P1 Gen 4, with latest 20.04,
it could be reproduced.
[Where problems could occur]
Although the nvidia driver is not released, I thought it's no harm to upgrade
xorg-server first.
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