Public bug reported:
A bug in PCRE was fixed upstream. The issue is a segfault with a pattern
like /\x{300000}/ui, e.g.
pcregrep -ui '\x{300000}' < /dev/null
There was no bounds checking on access to some UCD character tables, and
insufficient bounds checking in \x character construction. The fix was
included in a commit that did a lot of other things:
http://vcs.pcre.org/viewvc?view=revision&revision=774
but I have split out the relevant single-line fix for your convenience.
Patch attached.
** Affects: pcre3 (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1025670
Title:
Segfault (.bss overflow) in PCRE
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