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Bug 1623029 - (CVE-2018-15862) CVE-2018-15862 libxkbcommon: NULL pointer dereference in LookupModMask resulting in a crash
CVE-2018-15862 libxkbcommon: NULL pointer dereference in LookupModMask result...
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
low Severity low
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Assigned To: Red Hat Product Security
impact=low,public=20170626,reported=2...
: Security
Depends On: 1623038 1643483
Blocks: 1623044
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Reported: 2018-08-28 07:58 EDT by Andrej Nemec
Modified: 2018-10-26 06:59 EDT (History)
3 users (show)

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Fixed In Version: libxkbcommon 0.8.2
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Description Andrej Nemec 2018-08-28 07:58:58 EDT 
Unchecked NULL pointer usage in LookupModMask in xkbcomp/expr.c in xkbcommon before 0.8.2 could be used by local attackers to crash (NULL pointer dereference) the xkbcommon parser by supplying a crafted keymap file with invalid virtual modifiers.

Upstream patch:

https://github.com/xkbcommon/libxkbcommon/commit/4e2ee9c3f6050d773f8bbe05bc0edb17f1ff8371

References:

https://lists.freedesktop.org/archives/wayland-devel/2018-August/039243.html
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