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A double-free condition exists in contrib/shpsort.c of shapelib 1.5.0
and older releases. This issue may allow an attacker to cause a denial
of service or have other unspecified impact via control over malloc.
Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit 810c0eecf1)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>