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 <marc.deslauri...@ubuntu.com> 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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https://bugs.launchpad.net/bugs/1949553
Title:
Backport packages for 20.04.4 HWE stack
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