Public bug reported:
I think that the patch
https://gitlab.freedesktop.org/xorg/lib/libx11/commit/003e30a66a249f5c70b30d1c187385124cd4cdad
(issue: https://gitlab.freedesktop.org/xorg/lib/libx11/issues/49) should
be backported to both Ubuntu 16.04 LTS Xenial and Ubuntu 18.04 LTS
Bionic.
Although it didn't get an explicit CVS, use-after-free scenarios should
not get underestimated.
** Affects: libx11 (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1820509
Title:
Avoid use-after-free in _XimProtoSetIMValues()
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